Dilution: A theoretical burden or just load? A reply to Tsal and Benoni (2010).

Load theory of attention proposes that distractor processing is reduced in tasks with high perceptual load that exhaust attentional capacity within task-relevant processing. In contrast, tasks of low perceptual load leave spare capacity that spills over, resulting in the perception of task-irrelevant, potentially distracting stimuli. Tsal and Benoni (2010) find that distractor response competition effects can be reduced under conditions with a high search set size but low perceptual load (due to a singleton color target). They claim that the usual effect of search set size on distractor processing is not due to attentional load but instead attribute this to lower level visual interference. Here, we propose an account for their findings within load theory. We argue that in tasks of low perceptual load but high set size, an irrelevant distractor competes with the search nontargets for remaining capacity. Thus, distractor processing is reduced under conditions in which the search nontargets receive the spillover of capacity instead of the irrelevant distractor. We report a new experiment testing this prediction. Our new results demonstrate that, when peripheral distractor processing is reduced, it is the search nontargets nearest to the target that are perceived instead. Our findings provide new evidence for the spare capacity spillover hypothesis made by load theory and rule out accounts in terms of lower level visual interference (or mere “dilution”) for cases of reduced distractor processing under low load in displays of high set size. We also discuss additional evidence that discounts the viability of Tsal and Benoni's dilution account as an alternative to perceptual load. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Do sex differences in the brain explain sex differences in the hormonal induction of reproductive behavior? What 25 years of research on the Japanese quail tells us

Early workers interested in the mechanisms mediating sex differences in morphology and behavior assumed that differences in behavior that are commonly observed between males and females result from the sex specificity of androgens and estrogens. Androgens were thought to facilitate male-typical traits, and estrogens were thought to facilitate female-typical traits. By the mid-20th century, however, it was apparent that administering androgens to females or estrogens to males was not always effective in sex-reversing behavior and that in some cases a "female" hormone such as an estrogen could produce male-typical behavior and an androgen could induce female-typical behavior. These conceptual difficulties were resolved to a large extent by the seminal paper of C. H. Phoenix, R. W. Goy, A. A. Gerall, and W. C. Young in (1959, Endocrinology 65, 369-382) that illustrated that several aspects of sexual behavior are different between males and females because the sexes have been exposed during their perinatal life to a different endocrine milieu that has irreversibly modified their response to steroids in adulthood. Phoenix et al. (1959) therefore formalized a clear dichotomy between the organizational and activational effects of sex steroid hormones. Since this paper, a substantial amount of research has been carried out in an attempt to identify the aspects of brain morphology or neurochemistry that differentiate under the embryonic/neonatal effects of steroids and are responsible for the different behavioral response of males and females to the activation by steroids in adulthood. During the past 25 years, research in behavioral neuroendocrinology has identified many sex differences in brain morphology or neurochemistry; however many of these sex differences disappear when male and female subjects are placed in similar endocrine conditions (e.g., are gonadectomized and treated with the same amount of steroids) so that these differences appear to be of an activational nature and cannot therefore explain sex differences in behavior that are still present in gonadectomized steroid-treated adults. This research has also revealed many aspects of brain morphology and chemistry that are markedly affected by steroids in adulthood and are thought to mediate the activation of behavior at the central level. It has been explicitly, or in some cases, implicitly assumed that the sexual differentiation of brain and behavior driven by early exposure to steroids concerns primarily those neuroanatomical/neurochemical characteristics that are altered by steroids in adulthood and presumably mediate the activation of behavior. Extensive efforts to identify these sexually differentiated brain characteristics over the past 20 years has only met with limited success, however. As regards reproductive behavior, in all model species that have been studied it is still impossible to identify satisfactorily brain characteristics that differentiate under early steroid action and explain the sex differences in behavioral activating effects of steroids. This problem is illustrated by research conducted on Japanese quail (Coturnix japonica), an avian model system that displays prominent sex differences in the sexual behavioral response to testosterone, and in which the endocrine mechanisms that control sexual differentiation of behavior have been clearly identified so that subjects with a fully sex-reversed behavioral phenotype can be easily produced. In this species, studies of sex differences in the neural substrate mediating the action of steroids in the brain, including the activity of the enzymes that metabolize steroids such as aromatase and the distribution of steroid hormone receptors as well as related neurotransmitter systems, did not result in a satisfactory explanation of sex differences in the behavioral effectiveness of testosterone. Possible explanations for the relative failure to identify the organized brain characteristics responsible for behavio     

Are alcohol expectancies associations, propositions, or elephants? A reply to Wiers and Stacy (2010).

We provide a response to a commentary by Wiers and Stacy (see record 2009-24669-003) on our model of the alcohol–behavior link (see record 2009-09537-002). Whereas Wiers and Stacy generally supported our model, they took issue with our conceptualization of the alcohol expectancy construct. We address the major concerns of Wiers and Stacy by demonstrating that our own view is consistent with basic cognitive scientific conceptualizations of the nature of associative and propositional reasoning within a dual-systems framework. In clarifying these issues, we maintain that although the predictions presented by Wiers and Stacy are important and useful in this area, they are predictions that can be derived from our original formulation of the alcohol–behavior link. We conclude that this kind of useful debate can only aid the generation of conceptually consistent and testable models that will advance the understanding of the alcohol–behavior link. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

What is so special about male adolescent sexual offending? A review and test of explanations through meta-analysis.

We tested special and general explanations of male adolescent sexual offending by conducting a meta-analysis of 59 independent studies comparing male adolescent sex offenders (n = 3,855) with male adolescent non-sex offenders (n = 13,393) on theoretically derived variables reflecting general delinquency risk factors (antisocial tendencies), childhood abuse, exposure to violence, family problems, interpersonal problems, sexuality, psychopathology, and cognitive abilities. The results did not support the notion that adolescent sexual offending can be parsimoniously explained as a simple manifestation of general antisocial tendencies. Adolescent sex offenders had much less extensive criminal histories, fewer antisocial peers, and fewer substance use problems compared with non-sex offenders. Special explanations suggesting a role for sexual abuse history, exposure to sexual violence, other abuse or neglect, social isolation, early exposure to sex or pornography, atypical sexual interests, anxiety, and low self-esteem received support. Explanations focusing on attitudes and beliefs about women or sexual offending, family communication problems or poor parent–child attachment, exposure to nonsexual violence, social incompetence, conventional sexual experience, and low intelligence were not supported. Ranked by effect size, the largest group difference was obtained for atypical sexual interests, followed by sexual abuse history, and, in turn, criminal history, antisocial associations, and substance abuse. We discuss the implications of the findings for theory development, as well as for the assessment, treatment, and prevention of adolescent sexual offending. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"What counts in the development of young children's number knowledge?": Correction to Levine et al. (2010).

Reports an error in "What counts in the development of young children's number knowledge" by Susan C. Levine, Linda Whealton Suriyakham, Meredith L. Rowe, Janellen Huttenlocher and Elizabeth A. Gunderson (Developmental Psychology, 2010[Sep], Vol 46[5], 1309-1319). A coding error resulted in incorrect item-level data being reported on the point-to-x task (not the children‘s overall performance on this task) in Table 2 and in the section of the Results headed Point-to-X Task Performance (second column, p. 1314). In the first paragraph in the section, the correct average score for knowledge of cardinal meanings of the number words. In the second paragraph in the section, there is an example illustrating children’s greater performance on items involving a target and a distractor that were one digit apart. An additional adjustment in the second paragraph involves the finding that children performed better when at least one of two choice sets was a small number (1–3) than when both choice sets were greater than or equal to 4. More information for the corrections and the corrected table are given in the erratum. (The following abstract of the original article appeared in record 2010-17955-026.) Prior studies indicate that children vary widely in their mathematical knowledge by the time they enter preschool and that this variation predicts levels of achievement in elementary school. In a longitudinal study of a diverse sample of 44 preschool children, we examined the extent to which their understanding of the cardinal meanings of the number words (e.g., knowing that the word “four” refers to sets with 4 items) is predicted by the “number talk” they hear from their primary caregiver in the early home environment. Results from 5 visits showed substantial variation in parents' number talk to children between the ages of 14 and 30 months. Moreover, this variation predicted children's knowledge of the cardinal meanings of number words at 46 months, even when socioeconomic status and other measures of parent and child talk were controlled. These findings suggest that encouraging parents to talk about number with their toddlers, and providing them with effective ways to do so, may positively impact children's school achievement. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"Are individuals’ reputations related to their history of behavior?": Correction to Anderson and Shirako (2008).

Reports an error in "Are individuals' reputations related to their history of behavior" by Cameron Anderson and Aiwa Shirako (Journal of Personality and Social Psychology, 2008[Feb], Vol 94[2], 320-333). Coefficient alpha reliabilities for the social connectedness variable were reported as .97 and .78 in Studies 2 and 3, respectively. Instead, they should have been reported as intraclass correlations (ICC) of .87 and .74, respectively. In the original reliability analyses, the authors included self-ratings of social connectedness and thus omitted participants from the analysis who did not provide a self-rating. Similarly, the authors included self-ratings when assessing the reliability of social connectedness in an unreported classroom sample (n=36) that was collected at the same time as the data reported in Study 2. In that unreported sample, they originally obtained a coefficient that was far below satisfactory levels, leading them to exclude that data set. However, after taking out the self-ratings in that unreported sample, the ICC was .82. The erratum summarizes the correlations reported in Study 2 for the unreported and included data sets combined. (The following abstract of the original article appeared in record 2008-00466-010.) Functional theories of reputation imply that individuals' reputations are tied to their history of behavior. However, indirect evidence suggests that the relation between reputation and behavior might be tenuous at best. In 3 studies, the authors tracked the development of reputations among individuals who engaged in multiple negotiation tasks across several weeks. The authors found that on average, individuals' reputations were only mildly related to their history of behavior. However, the link between reputation and behavior was stronger for some individuals than others--specifically, for individuals who were more well-known and received more social attention in the community. In contrast, for less well-known individuals, their behavior had little impact on their reputation. The findings have implications for psychologists' understanding of reputations, person perceptions in larger groups, and the costs and benefits of social visibility. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

A comparative analysis of huddling in infant Norway rats and Syrian golden hamsters: Does endothermy modulate behavior?

In infant rats, huddling improves surface-to-volume ratios and provides metabolic savings during cold exposure. It is unclear, however, whether endothermy is also a necessary component of huddling. In the present experiment, huddles composed of infant Norway rats (2- or 8-day-olds), which produce heat endogenously, or Syrian golden hamsters (8-day-olds), which do not produce heat endogenously, were exposed to decreases in air temperature. Behavioral and physiological responses were monitored throughout the test. Rats, especially at 8 days of age, were better able to thermoregulate using huddling than hamsters, due in part to endogenous heat production. Furthermore, 8-day-old rats exhibited behavioral responses that promote heat retention, suggesting that both physiological and behavioral mechanisms contribute to effective thermoregulation during huddling in the cold. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Juvenile male rape victims: is the level of post-traumatic stress related to personality and parenting?

OBJECTIVE: The purpose of this study was to assess the level of post-traumatic stress in juvenile male rape victims and to test for its relationships with perceived parental rearing and personality dimensions. METHOD: Fifteen subjects (mean age of 16 years) were recruited from a correctional camp for juvenile criminals in Arkhangelsk, Russia. They were investigated by means of the "Revised Impact of Event Scale," the "Child Self-Report Post-Traumatic Stress Reaction Index," the "Hospital Anxiety and Depression Scale," the "EMBU" (perceived parental rearing) and the "Temperament and Character Inventory" (TCI). RESULTS: The level of post-traumatic stress, in most cases moderate to high, correlated with the temperament dimensions of harm avoidance and reward dependence. As concerns parental rearing, the total level of post-traumatic stress reaction was negatively correlated with paternal emotional warmth and positively with paternal rejection. CONCLUSIONS: The experience of post-traumatic stress is influenced by temperamental characteristics as well as by perceived parental rearing practices. Assumingly, these factors also play a role in becoming a rape victim, which deserves further investigation.     

One measure does not a construct make: Directions toward reinvigorating psychopathy research—reply to Hare and Neumann (2010).

In our article by J. L. Skeem & D. J. Cooke, (2010), we outlined the dangers inherent in conflating the Psychopathy Checklist—Revised (PCL–R; R. Hare, 1991) with psychopathy itself. In their response, R. Hare and C. Neumann (2010) seemed to agree with key points that the PCL–R should not be confused with psychopathy and that criminal behavior is not central to psychopathy; at the same time, they said we provided no clear directions for theory or research. In this rejoinder, we clarify our argument that progress in understanding the unobservable construct of psychopathy hinges upon setting aside procrustean dependence on a monofocal PCL–R lens to test (a) actual theories of psychopathy against articulated validation hierarchies and (b) the relation between psychopathy and crime. In specifying these conceptual and applied directions, we hope to promote constructive dialogue, further insights, and a new generation of research that better distinguishes between personality deviation and social deviance. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Toward an understanding of the influence of affective states on attentional tuning: Comment on Friedman and F?rster (2010).

Friedman and F?rster (2010) reviewed an extensive program of research that was consistent with the view that positive affective states broaden, whereas negative affective states narrow, the scope of attention. We applaud their creative investigations into these important psychological questions and appreciate their thorough review. However, recent evidence strongly suggests that the conclusions drawn by Friedman and F?rster need to be tempered, for the recent evidence suggests that motivational intensity rather than affective valence causes the modulations of attentional tuning. That is, affective states of low motivational intensity (e.g., sadness, postgoal positive affect) broaden attention, whereas affective states of high motivational intensity (e.g., disgust, pregoal positive affect) narrow attention. Our viewpoint is that attentional narrowing occurs during affective states of high motivational intensity to aid organisms in acquiring desirable objects and avoiding aversive ones. Attentional broadening occurs during affective states of low motivational intensity to open organisms to new opportunities. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

What we think we do (to each other): How personality can bias behavior schemas through the projection of if–then profiles.

People's knowledge about others includes not only person schemas about the typical traits of others but also behavior schemas about the likely interpersonal consequences of different behaviors. In this article, it is argued that perceiver effects can be interactive at the level of behavior schemas. A person's own personality configuration of if–then responses in social interactions (Mischel & Shoda, 1995) may contribute to that person's beliefs about the meaning and impact of relational behaviors more generally. In consequence, people who experience strong (or weak) responses to behaviors that vary along a particular trait dimension, such as warmth–coldness, may expect others to experience similarly strong (or weak) responses to those same kinds of behaviors. In 3 studies, people who were high in trait communion expected others to respond more strongly to behaviors that varied in warmth–coldness than did people who were low in trait communion, and people who were low in trait agency expected others to respond more strongly to behaviors that varied in assertiveness–unassertiveness than did people who were high in trait agency. Studies 2 and 3 provided evidence that participants' behavior schemas were based on assumptions derived from their own if–then personality profiles. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

What is the latent structure of alcohol use disorders? A taxometric analysis of the Personality Assessment Inventory Alcohol Problems Scale in male and female prison inmates.

Three indicators derived from the Personality Assessment Inventory (PAI) Alcohol Problems scale (ALC)—tolerance/high consumption, loss of control, and negative social and psychological consequences—were subjected to taxometric analysis—mean above minus below a cut (MAMBAC), maximum covariance (MAXCOV), and latent mode factor analysis (L-Mode)—in 1,374 federal prison inmates (905 males, 469 females). Whereas the total sample yielded ambiguous results, the male subsample produced dimensional results, and the female subsample produced taxonic results. Interpreting these findings in light of previous taxometric research on alcohol abuse and dependence it is speculated that while alcohol use disorders may be taxonic in female offenders, they are probably both taxonic and dimensional in male offenders. Two models of male alcohol use disorder in males are considered, one in which the diagnostic features are categorical and the severity of symptomatology is dimensional, and one in which some diagnostic features (e.g., withdrawal) are taxonic and other features (e.g., social problems) are dimensional. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

“Verbal working memory and language production: Common approaches to the serial ordering of verbal information”: Correction to Acheson and MacDonald (2009).

Reports an error in Verbal working memory and language production: Common approaches to the serial ordering of verbal information by Daniel J. Acheson and Maryellen C. MacDonald (Psychological Bulletin, 2009[Jan], Vol 135[1], 50-68). In the article “Verbal Working Memory and Language Production: Common Approaches to the Serial Ordering of Verbal Information” by Daniel J. Acheson and Maryellen C. MacDonald (Psychological Bulletin, 2009, Vol. 135, No. 1, pp. 50–68), the initial sentence of the text of the article (p. 50) contains an error. The first name of the researcher Andrew W. Ellis was listed incorrectly. The sentence should read as follows: Nearly 30 years ago, Andrew W. Ellis (1980) observed that errors on tests of verbal working memory (WM) paralleled those that occur naturally in speech production. (The following abstract of the original article appeared in record 2008-18777-007.) Verbal working memory (WM) tasks typically involve the language production architecture for recall; however, language production processes have had a minimal role in theorizing about WM. A framework for understanding verbal WM results is presented here. In this framework, domain-specific mechanisms for serial ordering in verbal WM are provided by the language production architecture, in which positional, lexical, and phonological similarity constraints are highly similar to those identified in the WM literature. These behavioral similarities are paralleled in computational modeling of serial ordering in both fields. The role of long-term learning in serial ordering performance is emphasized, in contrast to some models of verbal WM. Classic WM findings are discussed in terms of the language production architecture. The integration of principles from both fields illuminates the maintenance and ordering mechanisms for verbal information. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Change in job strain and progression of atherosclerosis: The Cardiovascular Risk in Young Finns study: Correction to Rosenstr?m et al. (2011).

Reports an error in Change in job strain and progression of atherosclerosis: The Cardiovascular Risk in Young Finns study by Tom Rosenstr?m, Mirka Hintsanen, Mika Kivim?ki, Markus Jokela, Markus Juonala, Jorma S. Viikari, Olli T. Raitakari and Liisa Keltikangas-J?rvinen (Journal of Occupational Health Psychology, 2011[Jan], Vol 16[1], 139-150). The order of authorship was listed incorrectly. The correct order is listed in the correction. (The following abstract of the original article appeared in record 2011-01470-011.) Evidence of the association between job strain, that is, a combination of high psychological demands and low job control, and markers of atherosclerosis is mixed, but few studies with repeat measures are available. The purpose of this study was to examine cross-sectional and longitudinal associations between job strain and atherosclerosis. The participants were 335 men and 374 women from the prospective Cardiovascular Risk in Young Finns study (mean age 38.5 years). Two sequential measurements of job strain and carotid intima-media thickness (IMT) were analyzed. No cross-sectional or longitudinal association between job strain and IMT was observed in women. In men, a cross-sectional association was found in 2001, but not in 2007. No dose-response effect was visible, nor a simple association between progression of job strain and progression of IMT. Instead, a more complex pattern of correlation was found in men with large decreases in job strain being associated with slower progression of IMT and combined decreases in job control and demands (a change toward passive jobs) being associated with greater IMT progression. These data suggest that temporal changes in job demands and control are associated with IMT in men via multiple mechanisms. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Are there species-universal categories in bird song phonology and syntax? A comparative study of chaffinches (Fringilla coelebs), zebra finches (Taenopygia guttata), and swamp sparrows (Melospiza georgiana).

Previous studies of learned bird song have suggested the existence of species-universal patterns in song organization: clear clusters in produced songs that do not vary within a species. Here the authors combine a computational method of comparing songs with statistical methods of assessing cluster structure to investigate this issue in a more quantitative manner. The authors first analyze song phonology and then examine song syntax at a population level in 3 species with very different song structure: chaffinches (Fringilla coelebs), zebra finches (Taenopygia guttata), and swamp sparrows (Melospiza georgiana). The authors used a dynamic time-warping algorithm to compare song elements, which closely matched the judgments of human observers. Clustering tendency and validation statistics showed that broad phonological categories existed in all 3 species, but these categories explained no more than half of the overall phonological variation. The authors developed a novel statistic to assess syntactical structure, which indicated that element transitions were not randomly distributed. In the clearest case, in chaffinches, this could be explained by syllables being linked to certain positions within the song. These results demonstrate measures of song organization that can be applied across species, enhancing the potential of comparative studies. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

"Perceiving unfairness in the family: Cause or consequence of marital distress?": Correction to Grote and Clark (2001).

Reports an error in "Perceiving unfairness in the family: Cause or consequence of marital distress" by Nancy K. Grote and Margaret S. Clark (Journal of Personality and Social Psychology, 2001[Feb], Vol 80[2], 281-293). The key coefficients on the diagonal paths were incorrect. The corrected figures in their entirety appear in the erratum. (The following abstract of the original article appeared in record 2001-16163-008.) This research tests a model suggesting that marital distress leads individuals to scrutinize of what is given and received in the relationship. This scrutiny elicits perceptions of unfairness that maintain or exacerbate marital distress. In a 3-panel longitudinal study tracking married couples across the transition to parenthood, both wives' and husbands' reports of marital conflict and wives' marital dissatisfaction at Time 1 positively predicted perceived unfairness of the allocation of household tasks at Time 2, controlling for earlier perceptions of unfairness. In addition, there was evidence of perceived unfairness of division of labor at Time 2 predicting marital conflict and marital dissatisfaction for wives at Time 3, controlling for earlier conflict and dissatisfaction. This model of relationship distress and perceptions of unfairness is contrasted with prior interpretations of links between perceived injustice and distress in relationships. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Examining the impact of Culture’s Consequences: A three-decade, multilevel, meta-analytic review of Hofstede’s cultural value dimensions: Correction to Taras, Kirkman, and Steel (2010).

Reports an error in Examining the impact of Culture's consequences: A three-decade, multilevel, meta-analytic review of Hofstede's cultural value dimensions by Vas Taras, Bradley L. Kirkman and Piers Steel (Journal of Applied Psychology, 2010[May], Vol 95[3], 405-439). Tables 1 and 2 were printed incorrectly due to errors in the production process. In Table 1 (p. 414), row 2 (vote count, data point count) the table incorrectly lists 0s for categories in which data points were not available; therefore the data cells should in fact be empty. In Table 2 (pp. 416–423), due to formatting errors some of the columns were incorrectly shifted either one or two columns to the right (i.e., in row 1, the “4” should be aligned under the “k,” not the “r”). The formatting errors in Tables 1 and 2, however, do not affect the values in the tables. Corrected versions of both Table 1 and Table 2 can be found at http://dx.doi.org/10.1037/a0020939 .supp. (The following abstract of the original article appeared in record 2010-09357-001.) Using data from 598 studies representing over 200,000 individuals, we meta-analyzed the relationship between G. Hofstede's (1980a) original 4 cultural value dimensions and a variety of organizationally relevant outcomes. First, values predict outcomes with similar strength (with an overall absolute weighted effect size of ρ = 0.18) at the individual level of analysis. Second, the predictive power of the cultural values was significantly lower than that of personality traits and demographics for certain outcomes (e.g., job performance, absenteeism, turnover) but was significantly higher for others (e.g., organizational commitment, identification, citizenship behavior, team-related attitudes, feedback seeking). Third, cultural values were most strongly related to emotions, followed by attitudes, then behaviors, and finally job performance. Fourth, cultural values were more strongly related to outcomes for managers (rather than students) and for older, male, and more educated respondents. Fifth, findings were stronger for primary, rather than secondary, data. Finally, we provide support for M. Gelfand, L. H. Nishii, and J. L. Raver's (2006) conceptualization of societal tightness–looseness, finding significantly stronger effects in culturally tighter, rather than looser, countries. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

What matters in implicit task sequence learning: Perceptual stimulus features, task sets, or correlated streams of information? Correction to Weiermann et al. (2010).

Reports an error in What matters in implicit task sequence learning: Perceptual stimulus features, task sets, or correlated streams of information by Brigitte Weiermann, Josephine Cock and Beat Meier (Journal of Experimental Psychology: Learning, Memory, and Cognition, 2010[Nov], Vol 36[6], 1492-1509). Two figures appearing on pages 1500 and 1502 contained incorrect labels for the x-axis of the control condition (ranran). The correct versions of Figure 3 and Figure 4 are provided in the erratum. (The following abstract of the original article appeared in record 2010-22281-001.) Implicit task sequence learning may be attributed to learning the order of perceptual stimulus features associated with the task sequence, learning a series of automatic task set activations, or learning an integrated sequence that derives from 2 correlated streams of information. In the present study, our purpose was to distinguish among these 3 possibilities. In 4 separate experiments, we replicated and extended a previous study by Heuer, Schmidtke, and Kleinsorge (2001). The presence or absence of a sequence of tasks, as well as that of a sequence of different task-to-response mappings, was manipulated independently within experiments. Evidence of implicit sequence learning was found only when correlated sequences of tasks and mappings were present. No sequence learning effects were found when only a single task sequence or a single mapping sequence was present, even when the structure of the single sequence was identical to the structure of the integrated sequence of task-mapping combinations. These results suggest that implicit task sequence learning is not dependent on either perceptual learning of stimulus features or automatic task-set activation per se. Rather, it appears to be driven by correlated streams of information. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

“Meta-analysis of free-response studies, 1992–2008: Assessing the noise reduction model in parapsychology”: Correction to Storm, Tressoldi, and Di Risio (2010).

Reports an error in Meta-analysis of free-response studies, 1992–2008: Assessing the noise reduction model in parapsychology by Lance Storm, Patrizio E. Tressoldi and Lorenzo Di Risio (Psychological Bulletin, 2010[Jul], Vol 136[4], 471-485). In the article, the second to last sentence of the abstract (p. 471) was stated incorrectly. The sentence should read as follows: “The mean effect size value of the ganzfeld database was significantly higher than the mean effect size of the standard free-response database but was not higher than the effect size of the nonganzfeld noise reduction database.” (The following abstract of the original article appeared in record 2010-12718-001.) We report the results of meta-analyses on 3 types of free-response study: (a) ganzfeld (a technique that enhances a communication anomaly referred to as “psi”); (b) nonganzfeld noise reduction using alleged psi-enhancing techniques such as dream psi, meditation, relaxation, or hypnosis; and (c) standard free response (nonganzfeld, no noise reduction). For the period 1997–2008, a homogeneous data set of 29 ganzfeld studies yielded a mean effect size of 0.142 (Stouffer Z = 5.48, p = 2.13 × 10?8). A homogeneous nonganzfeld noise reduction data set of 16 studies yielded a mean effect size of 0.110 (Stouffer Z = 3.35, p = 2.08 × 10?4), and a homogeneous data set of 14 standard free-response studies produced a weak negative mean effect size of ?0.029 (Stouffer Z = ?2.29, p = .989). The mean effect size value of the ganzfeld database were significantly higher than the mean effect size of the nonganzfeld noise reduction and the standard free-response databases. We also found that selected participants (believers in the paranormal, meditators, etc.) had a performance advantage over unselected participants, but only if they were in the ganzfeld condition. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Values, exchange relationships, group composition, and leader–member differences: A potpourri of reactions to Dose (1999).

This article is in response to J. J. Dose's (see record 1999-08068-003) article examining the role of values similarity in group composition. The themes of leader–member and team–member exchange, group composition, values similarity, and leader–member differences serve as the focus. Specifically, the authors suggest how themes from the organizational and group therapy literatures can serve to enrich theory and research in each domain. (PsycINFO Database Record (c) 2010 APA, all rights reserved)