Effects of alcohol on controlled and automatic memory processes.

The authors used the process-dissociation procedure (L. L. Jacoby, 1998) to examine the effects of alcohol on controlled and automatic influences on memory performance. Participants studied 1 of 2 word lists and subsequently were cued with word stems to recall the words from both lists. Fifty-four men were administered either a moderate dose of alcohol (0.82 g/kg) or placebo prior to studying the word list. Results indicated that alcohol decreased estimates of controlled contributions to performance on the task. In contrast, alcohol did not appear to affect automatic influences on this task. Integrated with recent findings using a different cognitive task, these data suggest that alcohol impairs performance on implicit, conceptually driven tasks but not on implicit, perceptually driven tasks. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of alcohol priming on social disinhibition.

Recent studies have suggested that exposure to rudimentary alcohol cues activates mental representations of alcohol expectancies in long-term memory, thereby promoting expectancy-consistent behavior changes. However, reliance in these previous studies on self-report measures raises the possibility that prior findings were an artifact of experimental demand. The present study was aimed at ruling out this alternative explanation by reinvestigating the effects of alcohol priming on nonconsumptive behavior using an implicit measure of social disinhibition. In three experiments, participants were exposed to either alcohol or control beverage images, then asked to type as quickly as possible the first word that came to mind in response to a series of provocative (e.g., feces) and neutral (e.g., chair) stimulus words. Participants’ response times were surreptitiously measured. Results revealed that participants exposed to images of alcohol, relative to control beverages, were faster to generate free associations to provocative, but not neutral, words, suggesting enhanced social disinhibition. This effect was limited to conditions of heightened evaluation, ruling out alternative explanations based on knowledge activation or arousal. Participants reported no suspicions regarding the connection between the image viewing and free association tasks nor any awareness that their response times had been collected. Results suggest that the behavioral effects of alcohol priming do not result from demand characteristics and offer the first evidence that exposure to rudimentary alcohol-related stimuli may suffice to influence social disinhibition in a manner akin to that expected to result from actual or placebo alcohol consumption. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of alcohol on person perception: A social cognitive neuroscience approach.

The acute effects of alcohol on cognitive processing of expectancy violations were investigated using event-related brain potentials and a cued recall task to index attentional and working memory processes associated with inconsistency resolution. As predicted, expectancy-violating behaviors elicited larger late positive potentials (LPP) and were recalled better than expectancy-consistent behaviors. These effects were moderated by alcohol and the valence of initial expectancies. For placebo group participants, positive targets performing negative behaviors elicited the largest LPP responses and were recalled best. For those in the alcohol groups, negative targets behaving positively elicited the largest LPP and recall responses. These findings suggest that alcohol does not globally impair working memory processes in person perception but instead changes the nature of valenced information processing. Findings are discussed in the context of alcohol's effects on working memory processes, reward sensitivity, and the prefrontal cortical structures thought to mediate them. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Self-control and alcohol restraint: An initial application of the Self-Control Strength Model.

Individuals whose self-control strength is depleted through the prior exertion of self-control may consume more alcohol in situations that demand restraint. Male social drinkers either exerted self-control by suppressing their thoughts or did not exert self-control while doing arithmetic. They then sampled beer. Participants expected a driving test after drinking and therefore were motivated to limit their intake. Individuals who suppressed their thoughts consumed more and achieved a higher blood alcohol content than those who did arithmetic. The groups did not differ in mood, arousal, or frustration. Individuals higher in trait temptation to drink consumed more after suppressing their thoughts relative to those lower in trait temptation. Alcohol intake may be a function of temptation to drink and self-control strength. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Differential effects of alcohol on working memory: Distinguishing multiple processes.

The authors assessed effects of alcohol consumption on different types of working memory (WM) tasks in an attempt to characterize the nature of alcohol effects on cognition. The WM tasks varied in 2 properties of materials to be retained in a 2-stimulus comparison procedure. Conditions included (a) spatial arrays of colors, (b) temporal sequences of colors, (c) spatial arrays of spoken digits, and (d) temporal sequences of spoken digits. Alcohol consumption impaired memory for auditory and visual sequences but not memory for simultaneous arrays of auditory or visual stimuli. These results suggest that processes needed to encode and maintain stimulus sequences, such as rehearsal, are more sensitive to alcohol intoxication than other WM mechanisms needed to maintain multiple concurrent items, such as focusing attention on them. These findings help to resolve disparate findings from prior research on alcohol's effect on WM and on divided attention. The results suggest that moderate doses of alcohol impair WM by affecting certain mnemonic strategies and executive processes rather than by shrinking the basic holding capacity of WM. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Measurement of attitudes toward alcohol and their relation to personality variables.

2 10-item alcohol attitude scales were developed from an available item pool. 1 scale measures favorability of attitude toward "social drinking" while the other taps attitude toward "alcoholism and the alcoholic." Scores on the scales were consistent with ratings of attitudes and of drinking behavior made from interview reports obtained from 2 college student samples participating in a longitudinal study, 92 students at Stanford University and 102 at the University of California, Berkeley. Alcohol attitudes of these groups were correlated with scores on 2 personality variables, "social maturity" and "impulse expression." Differences between the 2 samples, and between the sexes, are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of stimulus emotionality and sentence generation on memory for words in adults with unilateral brain damage.

Does sentence generation and/or stimulus emotionality enhance verbal memory in patients with neurological impairment? This question was addressed by testing 40 patients with unilateral stroke (20 with left-brain and 20 with right-brain damage) and 20 healthy control participants for recall and recognition of 48 target words. During encoding, emotional and nonemotional words were either presented in sentences (read condition) or used to form sentences (generate condition). Both word emotionality and generative processing improved memory performance in all groups. The authors suggest that a similar influence (i.e., cognitive activation) underlies both of these memory-enhancing effects, although the putative origins of the 2 effects are quite different. Neuropsychological underpinnings and clinical implications of these phenomena are discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of aging and IQ on item and associative memory.

The effects of aging and IQ on performance were examined in 4 memory tasks: item recognition, associative recognition, cued recall, and free recall. For item and associative recognition, accuracy and the response time (RT) distributions for correct and error responses were explained by Ratcliff's (1978) diffusion model at the level of individual participants. The values of the components of processing identified by the model for the recognition tasks, as well as accuracy for cued and free recall, were compared across levels of IQ (ranging from 85 to 140) and age (college age, 60–74 years old, and 75–90 years old). IQ had large effects on drift rate in recognition and recall performance, except for the oldest participants with some measures near floor. Drift rates in the recognition tasks, accuracy in recall, and IQ all correlated strongly. However, there was a small decline in drift rates for item recognition and a large decline for associative recognition and cued recall accuracy (70%). In contrast, there were large effects of age on boundary separation and nondecision time (which correlated across tasks) but small effects of IQ. The implications of these results for single- and dual-process models of item recognition are discussed, and it is concluded that models that deal with both RTs and accuracy are subject to many more constraints than are models that deal with only one of these measures. Overall, the results of the study show a complicated but interpretable pattern of interactions that present important targets for modeling. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

Group atmosphere and memory.

Subjects were read a story and then asked to recall it individually, in a group, and then individually again. During the group recall two variations in group atmosphere were employed: (a) cooperative vs competitive, and (b) democratic vs authoritarian leadership. General results included: (a) the group recall was superior to the average initial and final individual recall, and (b) the group recall in the cooperative atmosphere was superior to the group recall in the competitive atmosphere. Failure to provide adequate experimental conditions did not allow conclusions regarding the democratic-authoritarian variable. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The separate and combined effects of nicotine and alcohol on working memory capacity in nonabstinent smokers.

Research indicates that nicotine and alcohol are often used on the same occasion. However, the reasons for their concurrent use are not well understood. We hypothesized that one reason smokers use tobacco when they drink alcohol is to compensate for alcohol’s negative effects on processing capacity with nicotine’s enhancement of processing capacity. As such, the present study tested this theory by using an independent groups design to examine the separate and combined acute effects of alcohol and nicotine on working memory (WM) capacity. Nonabstinent daily smokers (n = 127) performed the counting span task (CSPAN) after consuming either an alcohol (men: 0.8 g/kg; women: 0.7 g/kg) or placebo beverage and smoking either nicotinized (1.14 mg nicotine, 15.9 mg tar) or denicotinized (.06 mg nicotine, 17.9 mg tar) cigarettes. Analyses revealed that smokers who smoked the nicotinized cigarettes performed significantly worse on the CSPAN task than smokers who smoked the denicotinized cigarettes. Although there was no main effect of alcohol on WM performance, women exhibited better WM performance than men after consuming alcohol whereas men performed better than women on the WM task after consuming the placebo beverage. Findings also revealed no interaction between the two substances on WM performance. Taken together, results suggest that nicotine impairs nonabstinent smokers’ verbal WM capacity and that gender moderates the effects of alcohol on WM. Furthermore, the present findings failed to support the notion that nicotine compensates for alcohol-related decrements in working memory capacity. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Exploring the alcohol expectancy memory network: The utility of free associates.

Alcohol expectancies are theorized to operate through associative memory networks. These networks are thought to differ on the basis of individual experience (direct and vicarious) with alcohol. Free-associate probabilities have been used in cognitive psychology as a metric of the associative strength of words to other words; this method has been used to establish the relationships within a semantic memory network. Participants from a large college sample were asked to free associate to the phrase "Alcohol makes me______" They were also asked about their quantity of alcohol consumption. Results showed that specific responses were given with different probabilities by individuals who drank at different levels. The heaviest drinkers tended to have more positive and arousing responses than did lighter drinkers, who tended to have more negative and sedating responses. These results underscore the need to take into account relevant individual differences in behavior and experience when characterizing semantic networks. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Alcohol's Dissociation of Implicit and Explicit Memory Processes: Implications of a Parallel Distributed Processing Model of Semantic Priming.

Alcohol's dissociation of implicit (unintentional) and explicit (intentional) memory processes in social drinkers was examined. It was hypothesized that an alcohol challenge would lower the percentage of words recalled and result in more retroactive interference in explicit recall tasks but would not lengthen reaction time in an implicit semantic priming task involving highly semantically similar words. Men and women completed all memory tasks in each of 2 counterbalanced sessions (alcohol challenge vs. no-alcohol) separated by 1 week. Alcohol significantly degraded processing in both explicit memory tasks, yet implicit semantic priming remained intact. A parallel distributed processing model that simulates semantic memory is presented. When this system is strongly activated, it does not appear to be altered during moderate alcohol intoxication. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Lowering risk for early alcohol use by challenging alcohol expectancies in elementary school children.

Altering alcohol expectancies has reduced alcohol use among young adults and may lead to successful prevention of early alcohol use. The authors randomly assigned 216 4th-grade children to an expectancy challenge or control condition and used individual-differences scaling to map expectancies into memory network format, with preference mapping to model likely paths of association. After expectancy intervention, children exhibited a greater likelihood to associate alcohol use with negative and sedating consequences and a decreased likelihood to associate alcohol with positive and arousing consequences. Children and adults who emphasize negative and sedating effects have been found to be less likely to use alcohol. Therefore, expectancy challenge interventions that have been successful at modifying expectancies and subsequently decreasing alcohol consumption of adults may be useful in reducing the likelihood of early alcohol use among children. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The role of advance expectancies in person memory.

Behaviors inconsistent with our general impression of another person are remembered better than are consistent behaviors, especially when only a few inconsistent behaviors occur (the set-size effect). In most previous studies of person memory, the behaviors to be remembered were accompanied by explicit trait information. Our studies showed that set-size effects also occurred when trait information was delayed or absent (Experiment 1) or when it contradicted the behavioral information (Experiment 2), but not when subjects were discouraged from forming a unitary impression (Experiment 3). These data do not support the hypothesis that the recall advantage for inconsistent behaviors depends on the presence of an advance expectancy, nor do they support a list-learning account of person memory. The results are most compatible with a model in which the perceiver spontaneously generates a behavior-based impression that is functionally equivalent to an expectancy-based impression in guiding memory for behaviors. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

The dynamics of memory retrieval in older adulthood.

One of the most robust findings in cognitive aging is that of a significant decline in self-initiated recall from episodic memory. In laboratory studies this deficit can be seen in significant age differences in word-list free recall. In this article, the authors focus on free recall of categorized word lists where one observes "response bursting" in the form of a rapid output of within-category items with longer delays between categories. Age differences appear primarily in between category latencies, results that are consistent with a relative sparing of semantic memory combined with an age-deficit in episodic retrieval. When adjusted for differences in overall mnemonic ability, it is demonstrated that the relationship between organization and learning remains invariant with normal aging. The authors argue that the locus of the age deficit in free recall lies at the level of temporal coding of items and the use of temporal associations to guide recall. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Leveling-sharpening and memory organization.

The Schematizing Test (see 35: 2266) and a psychophysical task utilizing the method of single stimuli were used to differentiate a group of "levelers" (in a perceputal sense—or, in a psychoanalytic sense, repressors) from "sharpeners." Ss were asked to relate requested details of a story (the Pied Piper of Hamlin), the story being used as a measure of remote memory. The groups were differentiated on the basis of such recall. The results were seen as supporting the effects of cognitive style upon memory. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Parental alcohol involvement and adolescent alcohol expectancies predict alcohol involvement in male adolescents.

Current models of adolescent drinking behavior hypothesize that alcohol expectancies mediate the effects of other proximal and distal risk factors. This longitudinal study tested the hypothesis that the effects of parental alcohol involvement on their children's drinking behavior in mid-adolescence are mediated by the children's alcohol expectancies in early adolescence. A sample of 148 initially 9–11 year old boys and their parents from a high-risk population and a contrast group of community families completed measures of drinking behavior and alcohol expectancies over a 6-year interval. We analyzed data from middle childhood (M age = 10.4 years), early adolescence (M age = 13.5 years), and mid-adolescence (M age = 16.5 years). The sample was restricted only to adolescents who had begun to drink by mid-adolescence. Results from zero-inflated Poisson regression analyses showed that 1) maternal drinking during their children's middle childhood predicted number of drinking days in middle adolescence; 2) negative and positive alcohol expectancies in early adolescence predicted odds of any intoxication in middle adolescence; and 3) paternal alcoholism during their children's middle childhood and adolescents' alcohol expectancies in early adolescence predicted frequency of intoxication in middle adolescence. Contrary to predictions, child alcohol expectancies did not mediate the effects of parental alcohol involvement in this high-risk sample. Different aspects of parental alcohol involvement, along with early adolescent alcohol expectancies, independently predicted adolescent drinking behavior in middle adolescence. Alternative pathways for the influence of maternal and paternal alcohol involvement and implications for expectancy models of adolescent drinking behavior were discussed. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Effects of goal-setting and feedback on memory performance and beliefs among older and younger adults.

This research examined the impact of goal-setting conditions on memory beliefs and performance among older and younger adults. After baseline recall and assessment of beliefs, participants were assigned to goal-setting, goals plus feedback, or control. Then, additional recall trials were followed by repeated memory beliefs assessments. For both younger and older adults, performance, motivation, and self-efficacy were affected positively by goal-setting. The impact of goals plus feedback was mixed and varied as a function of age and dependent measure. Success rates for reaching memory goals, which were low for the older adults, may have been a factor in these results. Adults' self-set recall goals were predicted initially by baseline performance and self-efficacy. On the final trial, goals were predicted by last trial performance, self-efficacy, and control beliefs. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Cognitive styles and memory for faces.

Accuracy in the incidental recall of photographed human faces can be predicted from the S's cognitive styles and biases: (a) Ss who were field dependent on an embedded-figures test recalled more faces correctly than did the field independent; (b) Ss who were narrow categorizers on the Pettigrew Category-Width Scale had better recall than had broad categorizers; and (c) Ss who thought the photographed persons were relatively young did better than those who thought they were older. These 3 kinds of stylistic consistency were mutually independent. Some of these styles may determine memory for all sorts of stimuli and some may be relatively specific to memory for faces. (PsycINFO Database Record (c) 2010 APA, all rights reserved)