On the role of experience versus motivation in predicting the own-race effect

The other-race effect (ORE) is a longstanding phenomenon in experimental psychology, where recognition for same-race faces is superior than for other-race faces. The present research pits two competing theories of perceptual expertise and social motivation against each other to see which is the more robust predictor of the ORE. In Study 1, we measured Black and White participants' prior contact with individuals from the other-race (i.e. expertise) as well as their expected level of future interaction with other-race individuals (i.e. motivation). Of the two theories, anticipated interaction (i.e. motivation) emerged as a significant predictor of the ORE. Study 2 followed the same design, measuring motivation with a self-report assessment of how much participants are willing to have cross-race friendships. Here, neither experience nor motivation predicted the ORE, though an ORE was established. Differences in measures that assess motivation and the experience versus motivation debate are discussed.     

Further evaluation of prompt density,rate of reinforcement,and the persistence of manding

Previous research has evaluated the effects of prompt rates on the rate of communicative behavior. More recent research has suggested that dense prompting can result in communicative behavior that is more resistant to change. However, existing research has not considered the impact that higher response rates had on reinforcement rate, a variable known to impact response persistence. The current study systematically replicated previous research by evaluating communicative responding in contexts associated with dense- and lean-prompt schedules and extended existing research by (a) holding reinforcement rates similar across the two prompting schedules (lean and dense), and (b) evaluating the persistence of communicative responding in the contexts associated with each prompting schedule. The results for Experiment 1 clearly replicated and extended previous research. The results for Experiment 2 were equivocal and suggested that previous reinforcement history and response class size impacted outcomes.     

“You're overreacting!”: The ambiguity of Asian American microaggressions delegitimizes collective action

Asian Americans are lauded as the model minority who are intelligent and industrious. Simultaneously, they are deemed as perpetual foreigners. The current research examines how racial microaggressions expressed by a White American source toward an Asian American target affect perceptions of the perpetrator and target. White Americans and Asian Americans read about an interaction between two college students, where the racial microaggression made was either an ambiguous expression of the model minority myth (MMM; all studies), an ambiguous perpetual foreigner stereotype (all studies), an unambiguous MMM (all studies), or no racial bias (Studies 2 and 3). Findings indicate that both Whites and Asian Americans respond differently—when exposed to the aforementioned conditions—regarding perceived racism of the White perpetrator and appropriateness of response by the Asian American target; however, they respond similarly regarding perceived legitimacy of collective action by the target. Nevertheless, Whites and Asian Americans deemed the ambiguous microaggression against the target as a model minority not racist relative to unambiguous MMM. Our findings show that ambiguous forms of bias toward Asian Americans go “under the radar” of both Whites and Asian Americans as being racist and contribute to the maintenance of the racial status quo.     

Social factors influence solo and rat dyads exploration of an unfamiliar open field

Animal Cognition - Exploring new and unfamiliar environments is critical for survival, providing information on food, shelter, mates, and sources of danger. The open field paradigm is commonly used...     

A suit for protecting chronically implanted devices in monkeys

The plastic barrel suit provides complete protection of chronically implanted fistulas and electrical connectors. The lost time, expense, and the frustrations of having these devices damaged was avoided.     

Grouping and short-term memory: Different means and patterns of grouping

Two experiments, concerned with the improving effects of grouping on auditory short-term memory, are described. In the first, temporal grouping was found to improve recall considerably, but non-temporal grouping had a much smaller effect. Temporal grouping reduced the order errors more than other errors; it also changed the pattern of the order errors. Further, it altered the shape of the serial position curve of all errors. In the second experiment, irregular patterns of temporal grouping were found to be inferior to a regular pattern. The results are discussed in terms of the time available for processing previous items during the presentation of a sequence, and the form that this processing may take.     

Experimental design symbolization and model derivation

A method of design symbolization (DS) is given for a class of designs in which all factors are related by complete crossing or by nesting. Characterization of acceptable DS's, and logical relational properties are given. It is shown how the design model can be obtained from the DS.The preparation of this article was supported by NIH Grant GM-11128, and by grants to the Institute of Human Learning by NSF and NIH.