Megachiropteran bats (Pteropus) utilize human referential stimuli to locate hidden food

Spontaneous point-following behavior has been considered an indicator of advanced social cognition unique to humans. Recently, it has been suggested that a close evolutionary relationship with humans could result in similar social skills in domesticated species. An alternative view is that the mechanism is not genetic domestication alone but instead a combination of phylogenetic and ontogenetic variables. Here we test the necessity of phylogenetic domestication by investigating the point-following behavior of a captive population of nondomesticated megachiropteran bats (Pteropus pumilus, Pteropus rodricensis, Pteropus conspicillatus, Pteropus vampyrus). Three of five subjects were highly successful in following an unfamiliar human's point to a target location, providing the first empirical evidence of cross-species social referencing in bats. The three successful bats were all born in captivity and socialized to humans early in life, whereas unsuccessful bats were wild-born individuals. This study provides evidence that referential point following is not restricted to domesticated animals and indicates that early experience may be important. Megachiropteran bats may prove to be a useful model for studying social behaviors.     

Intellectual ability in young men separated temporarily from their parents in childhood

We examined the effects of early life stress (ELS) on intellectual ability in 2,725 20-year-old male participants, of whom 321 were separated temporarily (mean 1.7 years) from both their parents during World War II, at an average age of 4.3 years. Intellectual ability was tested when entering compulsory military service. The separated men had − 0.28 (95% CI − 0.39, − 0.16), − 0.13 (95% CI − 0.25, − 0.01), − 0.18 (95% CI − 0.29, − 0.06), and − 0.19 (95% CI − 0.30, − 0.07) SD units lower verbal, visuospatial, arithmetic, and composite score of intellectual ability, respectively, compared to non-separated. Participants who were separated for more than a year and between two and four years had the lowest ability scores. ELS showed most consistent associations with verbal ability, but were not limited to it. Children beyond infancy and before their school-age may be the most vulnerable to the adverse effects of the ELS.     

The role of user resistance in the adoption of a mobile data service

While prior research has focused predominantly on enabling factors such as perceived usefulness in shaping users' information technology (IT) adoption/usage behaviors, this research explores the role of inhibiting factors such as user resistance to change, and their resultant impact on organizations' methods and systems. We elaborate on the interdependent and asymmetric effects of resistance to usage vis-à-vis usage enablers by postulating that resistance not only has a direct negative effect on IT usage, but also biases enabling factors such as perceived usefulness and intention to use in a negative manner. The resulting model is empirically validated with a longitudinal survey of mobile data service that supports real estate title claim processing by administrators and staff personnel at an Eastern European governmental agency. Our study advances IT usage research by demonstrating the salience of previously ignored inhibiting factors, establishing user resistance as an important construct to consider in IT usage research, and by elaborating the nomological relationships between resistance and current predictors of IT usage. We expect that these findings will provide the basis for a more comprehensive investigation of IT usage inhibitors and for building a theoretical model of user resistance.     

Language familiarity effects in short-term memory: The role of output delay and long-term knowledge

Four experiments examined the origins of language familiarity effects in bilingual short-term recall. In Experiments 1A and 1B, bilingual adults were tested on serial recall and probed serial recall of words and nonwords in their first and second languages. A first-language advantage was obtained on both measures, indicating that the beneficial effects of language familiarity are not exclusively attributable to lesser output delay during overt recall. In Experiments 2A and 2B, the same group of bilinguals was tested on serial recall and serial recognition of word lists in both languages. Although a sizeable first-language advantage was obtained on the serial recall measure, recognition performance was comparable in the two languages. On the basis of these results it is suggested that language differences in bilingual immediate memory arise in large part as a consequence of the differential availability of language-specific long-term knowledge with which to support retrieval processes in serial recall.     

Perceptions of the Limitations of Confidentiality Among Chinese Mental Health Practitioners,Adolescents and Their Parents

The present study aims to (a) survey Chinese mental health professionals’ attitudes toward therapeutic confidentiality with adolescent patients in specific clinical situations, and (b) compare Chinese adolescents’ and parents’ beliefs about when most mental health professionals would breach confidentiality. A sample of 36 mental health practitioners, 152 parents, and 164 adolescents completed a survey to assess their opinions about when confidentiality should be breached in 18 specific clinical situations (e.g., an adolescent tells his or her therapist that he or she smoked a cigarette, had unprotected sex, or attempted suicide). Nearly half of the parents (46%) and adolescents (41%) and 78% of the therapists in our sample selected “yes” in response to the question of whether the principle of confidentiality applies to adolescents. However, 49% of parents indicated “no,” and 53% of adolescents indicated “not sure.” Compared to adolescents, parents were significantly more likely to believe that therapists would breach confidentiality for the high-breach-likelihood items. For the low-breach-likelihood items, adolescents and parents were significantly more likely than therapists to believe confidentiality should be breached. Results from this study provide data to inform the development, refinement, practical implementation, and communication of guidelines and recommendations specific to adolescents receiving psychotherapy in China.     

Cognitive models of stereotype change (4): Motivational and cognitive influences

Three experiments investigating the effects of cognitive and motivational factors on stereotype change are reported. Trait ratings in all three experiments showed there to be greater stereotype-change when stereotype-inconsistent information was dispersed across many group members than when it was concentrated in only a few. A sorting task (Experiment 1) indicated that, in the concentrated conditions the stereotype disconfirmers were more strongly isolated from the rest of the group than in the dispersed conditions. Free recall protocols (Experiment 2) showed greater memory for the target exemplars when subjects anticipated interaction with a group member than when no interaction was anticipated. The questions subject chose to ask target group exemplars were also influenced by anticlpated future interaction. Subjects chose more stereotype-inconsistent questions when interactian was anticipated than when no interaction was anticipated. Experment 3 showed the impact of stereotype-inconsistent information to be greater when expectancies for the stereotyped group are weaker A cued-recall task yielded evidence of spontaneous subtyping. All these studies support the subtyping model, even in the presence of cognitive and motivational factors that might be expected to impede stereotype change.     

The effects of fear arousal,fear position,fear exposure,and sidedness on compliance with dietary instructions

Investigated the effects of fear arousal and sidedness variables on compliance with a dietary regimen. Experiments involved 202 women volunteers who were 10 per cent or more overweight, and aged 20-60 years. Experiment 1 involved a 3 (low, medium, high fear) × 2 (single, multiple exposure to fear message) × 2 (one-, two-sided communication) design. The fear levels involved discussing the health hazards of obesity. Experiment 2 manipulated the fear-message position relative to the recommendations (fear-recommendations, recommendations-fear, fear-delay-recommendations). Persuasive impact was measured via follow-up weight checks at 2, 4, 8, and 16 weeks. Results indicate nonsignificant effects from sidedness and pre-standardised fear levels. Using subjects' fear arousal ratings medium fear is significantly better (p < .025), supporting Janis's curvilinear hypothesis. A single exposure to the fear message is superior (p < .025) to multiple exposures, the interaction with time being highly significant (p < .001). Experiment 2 results indicate the optimum position for the fear message as immediately prior to recommendations (p < .025). Results support both cognitive and fear-reduction hypotheses, but the latter is favoured.