An item‐level investigation of conceptual and empirical distinctiveness of proactivity constructs

Beyond the prior investigations that took scale‐level approaches to determining discriminant validity in proactivity constructs, the current study contributes a much‐needed interrogation of the items used to measure the behaviors in this domain. The substantive validity (SV) assessments (Study 1) showed that many of the items were judged to be inconsistent with the definition of the construct they assess or, alternatively, more consistent with the definition of a different construct in the domain. Further, exploratory factor analysis revealed the difficulty in empirically separating the four behaviors, while BiM results also advocated against the unique variance of them after accounting for a general factor (Study 2). Altogether, our results show that the items are partly to blame for the empirical redundancy issue.     

The reliability of a model influences 14-month-olds’ imitation

Human infants have an enormous amount to learn from others to become full-fledged members of their culture. Thus, it is important that they learn from reliable, rather than unreliable, models. In two experiments, we investigated whether 14-month-olds (a) imitate instrumental actions and (b) adopt the individual preferences of a model differently depending on the model’s previous reliability. Infants were shown a series of videos in which a model acted on familiar objects either competently or incompetently. They then watched as the same model demonstrated a novel action on an object (imitation task) and preferentially chose one of two novel objects (preference task). Infants’ imitation of the novel action was influenced by the model’s previous reliability; they copied the action more often when the model had been reliable. However, their preference for one of the novel objects was not influenced by the model’s previous reliability. We conclude that already by 14 months of age, infants discriminate between reliable and unreliable models when learning novel actions.     

Book reviews

Women as Teachers and Disciples in Traditional and New Religions. Elizabeth Puttick & Peter B. Clarke, eds., 1993 Lampeter: Edwin Mellen Press 146 pp., £48.24 ISBN 0–7734–9346–8

Vrouwen in de wereldgodsdiensten. Teksten, tradities en recente on‐twikkelingen [Women in the World Religions: Texts, Traditions and Recent Developments]. Catherine Cornille, 1994 Rotterdam: Lemniscaat 183 pp., Belgian francs 570.00 ISBN 90–6069–933–5

Shadow of Spirit: Postmodernism and Religion. Philippa Berry & Andrew Wernick, eds., 1992 London: Routledge 274 pp., £35.00 hb and £12.99 pb ISBN 0–415–06638–7 and 06639–5

Political Islam, a special volume of the Annals of the American Academy of Political and Social Sciences. Charles Butterworth & I. William Zartman, eds., 1992 London: Sage 232 pp., US$17.00 £14.95 ISBN 0–8039–4687–2

The Sociology of Sacred Texts. Jon Davies & Isabel Wollaston, 1993 Sheffield: Sheffield University Press 195 pp., £35.00 ISBN 1–85075–404–7

A Generation of Seekers: The Spiritual Journeys of the Baby Boom Generation. Wade Clark Roof, 1993 New York: Harper Collins Publishers, Harper, San Francisco US$12.00 Aus$24.95 ISBN 006–066–9640

The American Encounter with Buddhism 1844–1912. Victorian Culture and the Limits of Dissent. Thomas A. Tweed, 1992 Bloomington, Indianapolis: Indiana University Press xxiv + 242 pp., US$29.95(h/b) ISBN 025–336–0994

Visions of Reality: What Fundamentalist Schools Teach. Albert J. Menendez, 1993 Buffalo, New York: Prometheus Books 152 pp., £12.50 ISBN 0–87975–802–3     

Selective copying of the majority suggests children are broadly “optimal‐” rather than “over‐” imitators

Human children, in contrast to other species, are frequently cast as prolific “over‐imitators”. However, previous studies of “over‐imitation” have overlooked many important real‐world social dynamics, and may thus provide an inaccurate account of this seemingly puzzling and potentially maladaptive phenomenon. Here we investigate this topic using a cultural evolutionary approach, focusing particularly on the key adaptive learning strategy of majority‐biased copying. Most “over‐imitation” research has been conducted using consistent demonstrations to the observer, but we systematically varied the frequency of demonstrators that 4‐ to 6‐year‐old children observed performing a causally irrelevant action. Children who “over‐imitate” inflexibly should copy the majority regardless of whether the majority solution omits or includes a causally irrelevant action. However, we found that children calibrated their tendency to acquire the majority behavior, such that copying did not extend to majorities that performed irrelevant actions. These results are consistent with a highly functional, adaptive integration of social and causal information, rather than explanations implying unselective copying or causal misunderstanding. This suggests that our species might be better characterized as broadly “optimal‐” rather than “over‐” imitators.     

Should We Take “Gender” Out of Gender Subtypes? The Effects of Gender,Evaluative Valence,and Context on the Organization of Person Subtypes

Previous research examining the organization of person subtypes has focused on gender and evaluation as organizing principles. Our research additionally examined subtype organization in terms of the classic “person categories” described in the self-concept and impression formation literature. Using both qualitative and quantitative measures, we examined the relative impact of these three mechanisms of subtype organization. We also investigated whether contextual cues impact subtype organization. We found that subtypes are more frequently organized in terms of person categories than by gender or evaluation. Also, as predicted, some subtype clusters' organization was relatively stable, whereas other subtype clusters were more sensitive to contextual influences. These results are discussed in terms of how characteristics that are salient in a situation may prime certain subtypes.     

Do apes and children know what they have seen?

Chimpanzees and young children understand much about what other individuals have and have not seen. This study investigates what they understand about their own visual perception. Chimpanzees, orangutans, and 2.5-year-old children were presented with a finding game in which food or stickers were hidden in one of two or three tubes. We varied whether subjects saw the baiting of the tubes, whether subjects could see through the tubes, and whether there was a delay between baiting and presentation of the tubes to subjects. We measured not only whether subjects chose the correct tube but also, more importantly, whether they spontaneously looked into one or more of the tubes before choosing one. Most apes and children appropriately looked into the tubes before choosing one more often when they had not seen the baiting than when they had seen the baiting. In general, they used efficient search strategies more often than insufficient or excessive ones. Implications of subjects' search patterns for their understanding of seeing and knowing in the self are discussed. Accepted after revision: 7 January 2001 Electronic Publication     

Further psychodrama with delinquent adolescents

It was postulated that an integration of behavioral-cognitive techniques within a psychodramatic group therapy framework would reduce delinquents' acting-out tendencies and improve ego strength. The population consisted of a control and an experimental group of adolescents aged 14 to 16 of both sexes that were adjudicated delinquent. There were ten adolescents in the control group and initially eleven adolescents in the experimental group (only seven completed the twelve ninety-minute sessions). Both pre- and posttest measures on the Jesness, the High School Personality Questionnaire, and the I-E Scale were administered to the two groups of subjects. The results showed that significant improvement occurred in the delinquents' asocial index (.01 level), ego strength (.05 level), and introversive tendencies (.01 level). This study demonstrated that behavioral contracting, monetary reinforcement, and alternative behavioral rehearsal can be effectively integrated with more traditional psychodramatic techniques to reduce delinquents' acting-out tendencies.