The effects of a physical (pressing the toes to the floor) and a mental (counting backward by sevens) countermeasure on the concealed knowledge test (CKT) were examined in a mock crime experiment with 40 subjects. Some knowledgeable subjects were informed about the nature of the CKT and were trained in the use of a countermeasure, whereas others remained uninformed. All subjects were offered a monetary reward if they could produce a truthful outcome. Subjects were tested using standard field techniques and instrumentation. The physical and, to a lesser extent, the mental countermeasures reduced the accuracy of the CKT. These results clearly demonstrate that the CKT has no special immunity to the effects of countermeasures.

A series of 4 experiments were conducted to (a) determine the willingness of children to lie in a realistic setting, (b) compare judgments of credibility from both lay evaluations and Criterion-Based Content Analysis (CBCA), and (c) examine the effects of expert testimony regarding Statement Validity Assessment on mock jurors who were asked to make evaluations of the children\u27s statements. In Experiment 1, 81% of children who witnessed a research assistant steal a textbook made accusations against the thief (truthful), 69% of children who did not witness the theft accused the research assistant of the theft following prompting by significant others, and 56% of the children who witnessed a significant other steal the textbook incorrectly accused the research assistant following a request from their significant other. Using the statements obtained from the children in Experiment 1, Experiments 2 and 3 found that classification accuracy of lay evaluators was significantly poorer than expert application of CBCA, which resulted in 89% classification accuracy. Finally, brief exposure to CBCA expert testimony appeared to have no benefits on mock jurors\u27 assessments of credibility of the children\u27s statements in Experiment 4. Implications for North American legal systems are discussed

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The present study examined the effects of caffeine, impulsivity, and gender on specific components of text processing as indicated by measures of reading time and recall. High-and low-impulsive male and female participants received 0, 2, or 4 mg of caffeine per kilogram of body weight. Participants read 3 narrative and 3 expository passages from a computer terminal at their own rate. Immediately after reading each story participants recalled the passage. Participants given caffeine took longer to read the passages and recalled more idea units than participants given a placebo. The effects of caffeine on reading time and recall were not specific to any component of text processing but resulted in a general slowing of reading time and improvement in recall. The effects of caffeine were influenced by both gender and impulsivity. Additionally, results suggest that manipulations that increase encoding difficulty may result in enhanced recall. 438This document is copyrighted by the American Psychological Association or one of its allied publishers.This article is intended solely for the personal use of the individual user and is not to be disseminated broadly.

Two aspects of mothering—using drugs during pregnancy and giving up the rearing of one's children—are the focus of this analysis of 58 addicted Chicana mothers who spent their adolescent years in barrio gangs. From a traditional stance, such women were doubly deviant, since they violated gender-role prescriptions by joining a barrio gang and by becoming involved in heroin and street life. Half of these women added to this deviance by using heroin during pregnancy, and 40 percent relinquished at least one of their children. This article explores what distinguishes these classically “bad mothers” from addicts who maintain some degree of conventionality in their mothering. We found that Mexican gender-role traditionalism is not the only influence on these women. Many came from cholo or underclass families with a tradition of street involvement. In addition, their involvement in gang and heroin worlds may influence their behavior as mothers. We found that women who used drugs during pregnancy were more likely than abstainers to be cholas and to reject traditional gender-role values. However, those who gave up their children were more likely than those who kept their children to be from traditional families. We discuss the implications of these findings for research on deviance and the underclass among Hispanic women.

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