The effect of postevent information on adults' eyewitness reports

The present experiment examined the conditions under which adults' reports of an event are influenced by information encountered after the event occurred. Adults were exposed to neutral, leading, and misleading postevent information about a target event 24 hours after that event. Twenty‐four hours after exposure to postevent information, participants were first asked a general, open‐ended question (free recall test procedure) and were then asked a series of specific questions. Some participants were asked to select their response from two possible alternatives (recognition test procedure) and some participants were required to generate their own answers to the same questions (directed recall test procedure). The nature of the original information, the nature of the postevent information, and the specificity of the questioning procedure influenced the number of correct responses and the number of misleading errors that participants made. These findings have important implications for interviewing adult witnesses. Copyright © 2001 John Wiley & Sons, Ltd.     

The influence of gender labels on the sex typing of imaginary occupations

Social scientists have been concerned not only with gender stratification within the occupational labor force but with young peoples' recognition and aspiration toward same-gender careers. In this paper we investigate how gender labels influence individuals' evaluational sex typing of occupations. Four gender-marked booklets were constructed such that six imaginary occupations within the story were performed by persons labeled as women, men, both men and women, or individuals. College, high-school, and fifth-and third-grade students were asked to evaluate whether a gender-marked occupation was a position for women, men, or both sexes and possible for girls and boys. Students were also asked to indicate which occupations they preferred. Not only were the occupations classified in relation to the gender labels, but occupational gender barriers were perceived. In essence, males were restricted from engaging in female-labeled jobs and females were restricted from engaging in male-labeled jobs. However, career aspirations     

The development of induction based on noun and feature labels

In two experiments, we examined the development of sensitivity to the inductive potential of shared novel noun and feature labels. Children (4-year-olds, 5-year-olds, and 8-year-olds) and adults were presented with a complete base stimulus and an incomplete target. The task was to infer whether the missing target feature matched the corresponding base feature. The base and target were given matching or mismatching novel labels, which were either count nouns or adjectives describing object features. Use of matching labels for induction increased with age. Nevertheless, all age groups were more likely to make inferences based on novel noun labels rather than feature labels. These results support the view that even preschool children grasp the conceptual significance of count nouns for induction.     

The roles of meaningfulness and prior knowledge in younger and older adults' memory performance

Meaningfulness and prior knowledge can have differing effects on both metamemory and memory performance. Personally relevant information may be deemed more meaningful, which often can serve as a mediating factor in memory performance. Additionally, information that is congruent with prior knowledge has been shown to be judged as easier to remember and often is better remembered. Both of these effects are most pronounced in older adults. The current study aimed to examine the impact of meaningfulness and prior knowledge on age‐related differences in metamemory (i.e., judgments of learning) and memory performance (i.e., recall and recognition) by manipulating subjective a priori familiarity and personal relevance using age‐relevant study materials (i.e., a student loan application and a Medicare application). Recall metamemory and recall performance results indicate that older adults, but not younger adults, were able to utilize meaningfulness and prior knowledge to boost memory performance.     

Young adults' perceptions of social sex roles across the life span

Fifty male and 50 female undergraduates rated 10 age-sex targets (Boy, Girl, Adolescent Boy, Adolescent Girl, Young Man, Young Woman, Middle-aged Man, Middle-Aged Woman, Old Man and Old Woman) on 12 semantic differential scales. Compared with female targets, male targets were rated higher on potency and activity scales and lower on evaluative scales. Semantic distance between male and female targets showed a curvilinear relationship with target age. Results suggested that young adult subjects perceive that sex-role differences first increase and then decrease across the life span.An earlier version of this article was presented at the convention of the Western Psychological Association in Los Angeles, California, April 1976.     

性激素对人类择偶偏好的影响

择偶是一种重要的心理、社会和文化现象,婚恋择偶除了会受当下社会文化习俗等人文因素的影响,也受到个体生理机制的影响。本文聚焦热点,从进化心理学的角度阐述性激素对人类择偶偏好的影响。女性的择偶偏好受生理周期激素变化的影响,男性的择偶则会因为体内睾酮含量的不同而发生变化。性激素不仅影响人的心理和行为,还会影响人类择偶决策的神经机制。未来的相关研究应关注生理周期的测定方法、被试的文化背景和个体间的差异等。     

Adults' perceptions of infant sex and cuteness

Five experiments were conducted to investigate the relationship between infant sex and adults' perceptions of infant physical attractiveness. College students rated the cuteness and/or sex of male and female infants at each of six age levels: 3, 5, 7, 9, 11, and 13 months. The results indicated that (a) subjects had little difficulty assigning a sex label to infants, although in some instances the assigned label was incorrect; (b) older infants received higher cuteness ratings than younger infants; (c) cuter infants were more likely to be perceived as female than male; (d) Labeled Males received higher cuteness ratings than Labeled Females, although this effect was stronger for Perceived Males than for Perceived Females; and (e) perceived cuteness influenced perceived sex. Results are interpreted as generally supporting the existence of a sex stereotype related to physical attractiveness.Preparation of this report was supported in part by an NIH 1 T32 MH 14622-01 Institutional National Research Service Award (KAH) and a Biomedical Sciences Research Support Grant (HEF & KAH).     

Undergraduate students' knowledge of infant and child development in a sample from a religiously-oriented university

Knowledge of child rearing is based on many factors. In the present study, 85 undergraduates (56 women, 46 Catholic) enrolled in psychology classes at a private university completed the Student Knowledge of Child Development Scale. Analysis showed a moderate relationship between scale scores with whether participants had taken a child development class and whether participants stated highest priority was a career or marriage and children.     

The effect of different soothing interventions on infant crying and on parent–infant interaction

Conducted in the home environment, this study examines the effects of three complementary soothing techniques on the duration of infant crying and on caregiver–infant interaction. In one group, the caregivers apply massage; in another, they provide supplemental carrying to their infants, and in the last, the caregivers both massage and provide supplemental carrying. Measurements, for the one control and three treatment groups took place prenatally (third trimester) and in the first 16 weeks postpartum for parental perception of infant temperament, parental sense of competence, parent–infant interaction, and the duration of infant crying. Whereas analyses indicate no statistically significant differences between groups in reducing infant crying, results approached significance (p ≤ .06) in favor of the combined supplemental carrying/massage group. These results challenge accepted beliefs that tactile stimulation and/or supplemental carrying enhance parental sense of competence, positive parental perceptions, and interactions with infants. Practitioners can apply these conclusions when counselling parents on the advisability of selecting any one complementary soothing technique. ©2002 Michigan Association for Infant Mental Health.     

Attention and the acquisition of new knowledge: their effects on older adults' associative memory deficit

Older adults experience a selective associative memory deficit by demonstrating intact item memory relative to impaired associative memory when compared with younger adults. Age-related deficits in associative memory have been suggested to arise from declines in attentional resources, and the role of attention during encoding and retrieval in associative memory for words and their spatial locations was investigated in the current experiment. Additionally, the tendency of younger and older adults to use knowledge acquired during encoding to improve their associative memory judgments through a strategic associative memory process was also investigated. Younger and older adults studied a list of words with each word belonging to one of four categories, which followed one of four mathematical probability structures for their presentation. Older adults exhibited intact item memory and impaired associative memory relative to full attention younger adults. In addition, both older and younger adults demonstrated an ability to engage in strategic associative memory, by learning and later using the probability structure introduced at study to guide their associative memory judgments. In contrast, dividing the attention of younger adults during encoding impaired item memory, associative memory and strategic associative memory, whereas dividing attention at retrieval did not result in similar deficits. These data add to a growing body of literature demonstrating older adults to exhibit a selective associative memory deficit that is not simulated by dividing the attention of younger adults at encoding or retrieval. Furthermore, younger and older adults maintain the ability to use new knowledge to guide their associative judgments.     

The effect of regulation goals on emotional event-specific knowledge

The constructivist nature of autobiographical memory leaves its retrieval susceptible to biases based on the current context. The present study addressed the hypothesis that the same memory could be recalled differently depending on a person's current regulation goals. In Experiment 1, a total of 58 participants recalled three events at a baseline session and again 2 weeks later when expecting to meet with an emotional individual. Individuals expecting to meet with a happy individual decreased the negative—and more specifically sad—words they used compared to the baseline session, whereas those expecting to meet with a sad individual showed the reverse effect. These findings were constrained by individual differences in extraversion. Significant effects were confined to events recalled second in order, suggesting the changes in emotional details might be due to controlled, regulatory processes. Using a false memory list-learning paradigm, Experiment 2 ruled out an alternative interpretation of the findings and confirmed that individuals can bias their memory in accord with regulation goals.     

Classifying adults' and children's faces by sex: computational investigations of subcategorical feature encoding

The faces of both adults and children can be classified accurately by sex, even in the absence of sex-stereotyped social cues such as hair and clothing (Wild et al., 2000). Although much is known from psychological and computational studies about the information that supports sex classification for adults' faces, children's faces have been much less studied. The purpose of the present study was to quantify and compare the information available in adults' versus children's faces for sex classification and to test alternative theories of how human observers distinguish male and female faces for these different age groups. We implemented four computational/neural network models of this task that differed in terms of the age categories from which the sex classification features were derived. Two of the four strategies replicated the advantage for classifying adults' faces found in previous work. To determine which of these strategies was a better model of human performance, we compared the performance of the two models with that of human subjects at the level of individual faces. The results suggest that humans judge the sex of adults' and children's faces using feature sets derived from the appropriate face age category, rather than applying features derived from another age category or from a combination of age categories.     

Maternal self-efficacy, knowledge of infant development, sensory sensitivity, and maternal response during interaction

When their infants were 6 months of age, mothers were assessed for self-efficacy (low, moderate, and high illusory control) and knowledge of infant development to determine their impact on mothers' behavioral sensitivity and affect during a feeding task at 9 months (N=70). Mothers' sensory sensitivity to digital images of infants' negative and positive expressions assessed in a signal detection task at 6 months was hypothesized to mediate this relation. Mothers with moderate illusory control exhibited greatest behavioral sensitivity and positive affect. Low knowledge was associated with reduced sensitivity for mothers with low illusory control only. When viewing the negative expression, mothers with moderate illusory control and high knowledge exhibited greatest sensory sensitivity, and mothers with high illusory control and moderate/high knowledge were least sensitive. Although sensory sensitivity was not a mediating variable, its relation to both illusory control and subsequent maternal measures during feeding was informative. Although greater sensory sensitivity predicted more sensitive behavior and more positive affect, only for maternal affect was the relation independent of illusion of control effects.     

The effect of sex and gender-schematic processing on sport participation

This study examined the extent to which an individual's overall experience with and personal commitment to athletic activities is constrained by the sex appropriateness of the sport, the sex of the individual, and the individual's classification on the Bem Sex Role Inventory. No sex differences were found for levels of participation for either measure of participation. For both measures, neutral sports were preferred, followed by sex-appropriate and then sex-inappropriate sports. Females' experience and commitment was greater than males' to feminine activities, whereas males' was greater than females' for masculine activities. Sex-typed males reported significantly less experience with and commitment to feminine sports than androgynous and undifferentiated males. When sex-typed females were compared with androgynous and cross-sex-typed females, they reported significantly less commitment to masculine sports.     

The development of sex differences in young children's activities at home: The effect of the social context

Randomly scheduled spot observations of 83 zero to six-year-old American middle-class children were used to investigate factors affecting the development of sex differences in young children's activities in and near their home. Sex and age differences in children's typical play and nonplay activities and in the people with whom they did activities were examined. The results showed that there were fewer sex differences in children's activities, activity partners, and general social settings than expected. Girls spent more time engaged in housework and school-related activities than boys, while boys spent more time in social gross motor play with other children and in self-care activities than girls. Children spent a surprisingly large amount of their time with members of their immediate family — particularly their mother and one other sibling. Boys and girls did not differ, however, in the time they were in settings or doing activities with their father, with their mother, or with same-or mixed-sex child groups.This research was supported by an award to the author from the Wisconsin Alumnae Research Foundation at the University of Wisconsin — Madison. The author would also like to acknowledge the research and editorial assistance of Daniel J. Walsh. In addition, Aletha Huston, Beatrice B. Whiting, and Gary G. Price provided valuable advice on this and earlier versions of this paper.