Gender and sexual orientation differences in sexual response to sexual activities versus gender of actors in sexual films.

In this study, the authors investigated the hypothesis that women's sexual orientation and sexual responses in the laboratory correlate less highly than do men's because women respond primarily to the sexual activities performed by actors, whereas men respond primarily to the gender of the actors. The participants were 20 homosexual women, 27 heterosexual women, 17 homosexual men, and 27 heterosexual men. The videotaped stimuli included men and women engaging in same-sex intercourse, solitary masturbation, or nude exercise (no sexual activity); human male-female copulation; and animal (bonobo chimpanzee or Pan paniscus) copulation. Genital and subjective sexual arousal were continuously recorded. The genital responses of both sexes were weakest to nude exercise and strongest to intercourse. As predicted, however, actor gender was more important for men than for women, and the level of sexual activity was more important for women than for men. Consistent with this result, women responded genitally to bonobo copulation, whereas men did not. An unexpected result was that homosexual women responded more to nude female targets exercising and masturbating than to nude male targets, whereas heterosexual women responded about the same to both sexes at each activity level. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neural correlates of spatial term use.

The current research used event-related brain potentials (ERPs) to assess the processes underlying online apprehension of the spatial term above. Constituent steps defined within G. D. Logan and D. D. Sadler's (1996) computational theory of apprehension were associated with distinct modulations of ERPs. Specifically, finding the relevant objects was associated with an amplitude modulation of P3; competition in assigning directions to space was associated with modulation of a frontal slow wave; and computing and comparing the spatial relation was associated with modulation of a parietal slow wave. These modulations were differentially influenced by the type of reference frame used to define the spatial term and by the participant's response. The current study supports this decompositional approach to apprehension and provides a means of assessing each step independently. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neural systems subserving valence and arousal during the experience of induced emotions.

The circumplex model of affect construes all emotions as linear combinations of 2 independent neurophysiological dimensions, valence and arousal. We used functional magnetic resonance imaging to identify the neural networks subserving valence and arousal, and we assessed, in 10 participants, the associations of the BOLD (blood oxygen level-dependent) response, an indirect index of neural activity, with ratings of valence and arousal during the emotional experiences induced by the presentation of evocative sentences. Unpleasant emotional experience was associated with increased BOLD signal intensities in the supplementary motor, anterior midcingulate, right dorsolateral prefrontal, occipito-temporal, inferior parietal, and cerebellar cortices. Highly arousing emotions were associated with increased BOLD signal intensities in the left thalamus, globus pallidus, caudate, parahippocampal gyrus, amygdala, premotor cortex, and cerebellar vermis. Separate analyses using a finite impulse response model confirmed these results and revealed that pleasant emotions engaged an additional network that included the midbrain, ventral striatum, and caudate nucleus, all portions of a reward circuit. These findings suggest the existence of distinct networks subserving the valence and arousal dimensions of emotions, with midline and medial temporal lobe structures mediating arousal and dorsal cortical areas and mesolimbic pathways mediating valence. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Two correlates of symbolic sexual arousal: Level of anxiety and liking for esthetic material.

"The present study tests two Freudian hypotheses concerning the symbolic expression of sexual arousal: that symbolic sexual arousal occurs to a greater extent in persons of high anxiety level, and that degree of liking for esthetic materials is positively related to the degree of symbolic sexual arousal in response to those materials. Both hypotheses were confirmed in an experiment with 73 female undergraduates involving the content analysis of imaginative stories written in response to music. Possible implications for anxiety and for the psychology of art were suggested." From Psyc Abstracts 36:02:2HM96W. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Influences of sexual sensation seeking, alcohol consumption, and sexual arousal on women's behavioral intentions related to having unprotected sex.

This experimental study examined effects of alcohol consumption and sexual sensation seeking on unprotected sex intentions, taking into account sexual arousal, indirectly discouraging sex, and condom insistence. Women (N = 173; mean age = 25.02) were randomly assigned to a control, placebo, low-dose beverage (target blood alcohol level = .04), or high- dose beverage (target blood alcohol level = .08) condition. Participants projected themselves into a hypothetical sexual interaction with a man in which no condom was available. Structural equation modeling demonstrated that both sexual sensation seeking and alcohol dose directly increased sexual arousal early in the interaction, but later sexual arousal indirectly increased unprotected sex intentions by decreasing endorsement of indirect discouragement and, in turn, condom insistence. These findings help to clarify the role of alcohol consumption and sensation seeking in women's sexual decision making and point to the importance of examining it as a multistage process. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The impact of alcohol and alcohol expectancies on male perception of female sexual arousal in a date rape analog.

The impact of alcohol and alcohol expectancies on men's perception of female sexual arousal and men's ability to discriminate accurately female sexual intentions in a dating situation was examined. In a 2 (alcohol)?×?2 (expectancy) balanced placebo design, men were exposed to an audiotape of a date rape and asked to signal when the man should stop making sexual advances. On 4 occasions during the vignette, participants rated how sexually aroused the woman on the tape was at that moment. Relative to controls, participants who consumed alcohol or expected to consume alcohol took significantly longer to identify the inappropriateness of the man's sexual behavior toward his date. Similarly, alcohol participants also rated the woman's sexual arousal level significantly higher at the first 2 refusals. Implications of the results are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Alcohol and erectile response: The effects of high dosage in the context of demands to maximize sexual arousal.

Although drinking often precedes men's sexual activity, basic questions about alcohol's effects on men's sexual arousal remain unanswered. Inconsistencies in findings from studies examining subjective and physiological effects on erectile functioning suggest these effects are context specific, for example, dependent on whether a man wants to maximize or suppress his arousal. To address unresolved questions about alcohol and erectile functioning, the authors evaluated the effects of high blood alcohol concentrations (BACs) and arousal instructional demands on indices of penile circumference change and self-reported sexual arousal. In Study 1, a target BAC of .10% (vs. .00%) attenuated peak circumference change from a neutral baseline but did not affect mean change, latency to arousal onset (a 5% increase in circumference from baseline), latency to peak achieved arousal, or subjective arousal, which correlated moderately with physiological indices. In Study 2, instructions to maximize (vs. suppress) arousal increased peak and mean circumference change and interacted with a target BAC of .08% (vs. .00%) to influence latency to arousal onset. Sober men instructed to maximize showed a shorter latency to arousal onset than did those instructed to suppress arousal; however, intoxicated men did not show a differential pattern. Moreover, compared with intoxicated counterparts, sober men instructed to maximize arousal showed a marginally shorter latency to arousal onset. Overall, alcohol and arousal instructions had small but discernible effects. Findings highlight the importance of contextual factors in alcohol's impact on erectile functioning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Neural correlates of age-related declines in the formation and realization of delayed intentions.

Neural correlates of age-related declines in prospective memory were studied by using event-related brain potentials (ERPs) in a task in which individuals formed and later realized simple intentions. The behavioral data revealed that prospective responding was less accurate and slower in older than in younger adults. The electrophysiological data revealed age-related differences in the amplitude of modulations of the ERPs associated with the encoding of intentions, the detection of cues, and disengagement from the ongoing activity. These findings support the hypothesis that age-related declines in prospective memory result from a reduction in the efficiency with which older adults encode intentions and detect cues. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Spinning in the scanner: Neural correlates of virtual reorientation.

Recent studies have used spatial reorientation task paradigms to identify underlying cognitive mechanisms of navigation in children, adults, and a range of animal species. Despite broad interest in this task across disciplines, little is known about the brain bases of reorientation. We used functional magnetic resonance imaging to examine neural activity in adults during a virtual reality version of the reorientation task. Three environments that varied in the cues provided were studied: a rectangular room with 4 identical gray walls (Geometry), a square room with 3 gray walls and 1 red wall (Feature), and a rectangular room with 3 gray walls and 1 red wall (Feature + Geometry). Multiple areas within the medial temporal lobe (MTL) showed increased activation when a feature was present compared with when reorientation was based only on geometric cues. In contrast, reliance on geometric cues significantly activated a number of non-MTL structures, including the prefrontal cortex and inferior temporal gyrus. These results provide neural evidence for processing differences between the 2 types of cue as well as insight into developmental and comparative aspects of reorientation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Patterns of cardiac arousal during complex mental activity.

The purpose of the study was to explore the relationship between cardiac rate, as a measure of autonomic activity, and degree of efficiency in complex mental activity. Following Hebb, it was postulated that motivation to solve problems is accompanied by increased action in the autonomic nervous system; specifically, that efficient problem solving would be accompanied by increased and more variable cardiac activity as compared to nonefficient problem solvers. The results support the hypotheses. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Extreme right-handedness, older brothers, and sexual orientation in men.

Two of the most consistent correlates of sexual orientation in men are handedness and fraternal birth order (i.e., number of older brothers). In the present study, the relationship among handedness, older brothers, and sexual orientation was studied in 4 samples of heterosexual and gay or bisexual men (N = 944). Unlike previous studies, which have only observed an increased rate of non-right-handedness in gay or bisexual men relative to heterosexual men, an elevated rate of extreme right-handedness was found in gay or bisexual men relative to heterosexual men. The results also demonstrated that older brothers moderate the relationship between handedness and sexual orientation. Specifically, older brothers increase the odds of being gay or bisexual in moderate right-handers only; in both non-right-handers and extreme right-handers, older brothers do not affect (or decrease) the odds of being gay or bisexual. The results have implications for an early neurodevelopmental origin to sexual orientation in men. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The effect of emotional arousal on subsequent sexual arousal in men.

The effect of emotional arousal on subsequent sexual arousal was assessed in 14 18–34 yr old men. Ss initially viewed either 1 of 2 emotionally arousing videotapes (depression-and-anger or anxiety-and-anger producing) or a neutral videotape (a travelogue), each of which was followed by an erotic videotape. Sexual arousal was measured physiologically with a penile strain gauge. Although there were no differences in the level of sexual arousal during the antecedent emotionally arousing or neutral videotapes, sexual arousal during the subsequent erotic videotapes was differentially affected by them. Sexual arousal following the anxiety-and-anger videotape was greater than that following either the depression-and-anger videotape or the travelogue. Prior exposure to the travelogue resulted in greater sexual arousal than did the videotape producing depression and anger. (10 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Activation of POMC neurons during general arousal but not sexual behavior in male rats.

Exogenous opioids influence male rat sexual behavior, suggesting that endogenous opioid peptides are released during mating. Supporting this hypothesis, the authors recently showed that mating induced activation of mu opioid receptors. However, it is unknown which ligand(s) is acting on these receptors during mating. The current set of experiments tested the hypothesis that beta-endorphin-producing neurons, that is, proopiomelanocortin (POMC) neurons, are activated during sexual behavior. Mating-induced activation of POMC neurons was investigated during either the dark phase or the light phase, following different components of male rat sexual behavior or following control manipulations that resulted in general arousal. Results show activation of POMC neurons in the mediobasal hypothalamus following general arousal but not specifically related to sexual behavior per se. In addition, mating did not activate the subpopulation of POMC neurons that project to the medial preoptic nucleus. These results suggest that it is unlikely that POMC neurons contribute to the action of endogenous opioids in the brain area during sexual behavior but instead may contribute to the change in arousal state essential for the expression of sexual behavior. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of Pornography and sexual aggression.

Reviews the book, Pornography and sexual aggression by N. M. Malamuth and E. Donnerstein (1984). Malamuth and Donnerstein are well qualified to prepare a book on pornography by virtue of their extensive research on the topic over the last several years. In 1970, the United States Commission on Obscenity and Pornography concluded that there was no evidence that pornography had adverse effects on the incidence of violence toward women. It is clear from Malamuth and Donnerstein's chapters that they believe the evidence now points to radically different conclusions and that a book summarizing all of the evidence was warranted. In the opening chapters, Malamuth and Donnerstein present summaries of their respective lines of research. Malamuth has concentrated primarily on the effects of aggressive pornography on men's sexual arousal to portrayals of coercive sexual interactions, their self-reported likelihood to rape, their acceptance of rape myths, their acceptance of interpersonal violence, and the belief that women enjoy being raped. Donnerstein discusses the effects of aggressive pornography on men's aggression toward females in a laboratory situation. The evidence presented in the book points to three main conclusions: (a) portrayals of sex and violence in the media have important effects on at least some people; (b) it is possible to formulate general theories to account for most of the results presented; and (c) the results present serious problems for society. This book is an important contribution to the literature on the effects of pornography. Put together in one volume, the evidence on the effects of pornography, especially violent pornography, is very convincing. The theoretical aspects of why this should be so are much less convincing. But the authors have made a good beginning. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Experiencing activation: Energetic arousal and tense arousal are not mixtures of valence and activation.

R. E. Thayer (1989) proposed 2 types of activation: energetic arousal (awake-tired) and tense arousal (tense-calm). This view has been challenged by claims that energetic arousal and tense arousal are mixtures of valence and a single activation dimension. The authors present a direct test of this hypothesis by computing the correlation between the residuals of energetic arousal and tense arousal after removing the shared variance with valence. Whereas the valence activation hypothesis predicts a strong positive correlation between the 2 residuals, the authors found that it was not significantly different from 0. This finding reaffirms the view of energetic arousal and tense arousal as 2 distinct types of activation. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The role of sexual arousal and sexual partner characteristics in HIV+ MSM's intentions to engage in unprotected sexual intercourse.

Objective: This study investigated the effects of sexual arousal and sexual partner characteristics as determinants of HIV+ men who have sex with men's (MSM) intentions to engage in unprotected sex. Design: In a computer-based controlled experiment, 67 HIV+ MSM underwent a sexual arousal manipulation and indicated their intentions to engage in unprotected sex with hypothetical partners who differed in terms of HIV serostatus, physical attractiveness, relationship type, and preference for condom use. Main Outcome Measures: Computer-delivered questions assessed HIV+ MSM's intentions to engage in various sexual acts with each hypothetical partner. Results: As predicted, sexually aroused HIV+ MSM indicated stronger intentions to engage in unprotected sex than nonaroused HIV+ MSM; and having a partner who was attractive, HIV+, long term, or who preferred not to use condoms, also led to riskier intentions. Several significant interactions among these factors were found, which were generally consistent with predictions and with theory and research on cognitive processing and decision making. Conclusions: These findings have implications for understanding risky sexual behavior among HIV+ individuals and for the development of interventions to reduce this risk. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Within-group differences in sexual orientation and identity.

The purpose of this investigation was to examine within-group differences among self-identified sexual orientation and identity groups. To understand these within-group differences, 2 types of analysis were conducted. First, a sample of 2,732 participants completed the Sexual Orientation and Identity Scale. Cluster analyses were used to identify 3 types of bisexual women, 3 types of bisexual men, 2 types of heterosexual women, and 2 types of gay men. Lesbians and heterosexual men were clustered into singular groupings. In addition, a subsample of 838 participants also completed measures of sexual identity development and lesbian, gay, and bisexual knowledge and attitudes. Within-group differences were found for bisexual men and women, gay men, and heterosexual women along these dimensions. Findings supported the existence of distinct subgroups of bisexual men, bisexual women, gay men, and heterosexual women. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Review of The mismeasure of desire: The science, theory, and ethics of sexual orientation.

Reviews the book, The mismeasure of desire: The science, theory, and ethics of sexual orientation by Edward Stein (see record 1999-04230-000). It would hardly be overstating the matter to say that perhaps the single most hotly debated issue in both psychology and contemporary American culture is the nature and origins of human sexual desires. In opposition to the currently more widely accepted thesis that sexual orientation is determined at birth, philosopher and educator Edward Stein argues in this new book that much of what we think we know about the origins of sexual desire is probably misguided and incomplete. Carefully examining a broad range of research on sexual orientation, Stein suggests that many of the most frequently cited findings are deeply flawed—not only methodologically but also in light of certain unquestioned philosophical assumptions and cultural stereotypes. Although the arguments in Stein’s book are more than a little likely to create controversy, and, indeed, some may well be found to be specious, his book is nonetheless a very welcome infusion of thoughtful philosophical and psychological thinking into the all-too-often muddled arena of contemporary academic and political debate. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Prevalence and correlates of sexual activity and HIV-related risk behavior among psychiatric outpatients.

This study investigates the prevalence and correlates of sexual activity and HIV-risk behavior among adults with a mental disorder. Demographic, psychiatric, sexual behavior, and substance-use data were available for 1,558 outpatients. During the past year, 69% were sexually active and 23% engaged in risky behavior. Risk markers included multiple sexual partners (19%), a sexually transmitted disease (4%), sex trading (3%), injection drug use (1%), and needle sharing (     

Neural correlates of individual differences in strategic retrieval processing.

Processes engaged when information is encoded into memory are an important determinant of whether that information will be recovered subsequently. Also influential, however, are processes engaged at the time of retrieval, and these were investigated here by using event-related potentials (ERPs) to measure a specific class of retrieval operations. These operations were revealed by contrasts between ERPs elicited by new (unstudied) test items in distinct tasks, the assumption being that these contrasts index operations that are engaged in service of retrieval and that vary according to the demands of different retrieval tasks. Specific functional accounts of this class of retrieval processing operations assume that they influence the accuracy of memory judgments, and this experiment was designed to test for the first time whether this is in fact the case. Toward this end, participants completed 2 retrieval tasks while ERPs were acquired, and the extent to which processes were engaged differentially across tasks in service of retrieval was operationalized as the magnitude of the differences between the new-item ERPs that were elicited. This measure correlated positively with response accuracy on the tasks, which provides strong evidence that this class of retrieval processing operations benefits the accuracy of memory judgments. (PsycINFO Database Record (c) 2010 APA, all rights reserved)