Categorization influences illusory conjunctions

Illusory conjunctions (ICs) provide evidence for a binding problem that must be resolved in vision. Objects that are perceptually grouped are more likely to have their features erroneously conjoined. We examined whether semantic grouping, determined by category membership (letter vs. number), also influences illusory conjunction rates. Participants were instructed to detect an “L” or a “7” among briefly presented character strings and to report its color. Despite high shape discrimination accuracy, participants often made color conjunction errors, reporting instead the color of a distractor character, “O”. This distractor could be ambiguously interpreted as a letter or a number. The status of the “O” was determined by other noncolored flanker characters, which were either letters or numbers. When both the target and flankers were of the same category, participants made more ICs than when the target and flankers were of different categories. This finding demonstrates that alphanumeric categorization can precede and subsequently influence binding.     

Rapidly learned song-discrimination without behavioral reinforcement in adult male zebra finches (Taeniopygia guttata)

Zebra finches communicate via several distinct vocalizations, of which song is the most studied. Behavioral observations indicate that adults are able to discriminate among the songs of different conspecific individuals. In the wild, zebra finches live in structured but mobile colonies, and encounter new individuals on a frequent basis. Thus it seems plausible that adult finches might have the capacity to recognize and remember new songs they encounter on a single day, but this has never been directly tested. Here we devised a simple observational assay to determine whether adult male zebra finches show recognition of a song they have heard repeatedly from taped playbacks, over a single three hour period the day before. We quantified the rate of production of six discrete behaviors (short calls, contact calls, singing, short hops, long hops, and beak swipes) made by adult male zebra finches as they listened to the playbacks. At the onset of song playback, all birds suspended these behaviors and sat silently-occasionally moving their heads. Then, after a measurable period ("response latency"), the birds resumed these activities. We observed that the response latency was long (approximately 10 min) when birds were hearing a particular song for the first time. The response latency was much shorter (approximately 1-2 min) when the birds had heard the same song the day before. Thus, functional song memories must result from as little as 3 h of passive song-exposure. These results suggest that ongoing song learning may play a natural role in the daily life of adult zebra finches, and provide a behavioral reference point for studies of molecular and physiological plasticity in the adult auditory system.     

The role of interference in memory span

In two experiments, we investigated the possibility that susceptibility to proactive interference (PI) affects performance on memory span measures. We tested both younger and older adults (older adults were tested because of the suggestion that they are differentially susceptible to PI). We used two different span measures and manipulated testing procedures to reduce PI for these tasks. For older adults, span estimates increased with each PI-reducing manipulation; for younger adults, scores increased when multiple PI manipulations were combined or when PI-reducing manipulations were used in paradigms in which within-task PI was especially high. The findings suggest that PI critically influences span performance. We consider the possibility that interference-proneness may influence cognitive behaviors previously thought to be governed by capacity.     

A Conceptualization and Test of the Influences of Individual Differences in Goal-Setting Situations1

This research tests a hypothesized model of the relationships among several individual differences and variables associated with the setting of goals. Participants were randomly assigned to a self-set goal condition, or to moderately or very-difficult assigned-goal conditions. By aggregating scores of performance, personal goals, ratings of self-efficacy, and goal commitment over multiple goal-setting and task-performance occasions, the overall relationships among these variables and need for achievement, self-esteem, and locus of control were determined. Results provide strong support for Locke and Latham's (1990a, 1990b) model of the goal-performance relation, but fail to support the hypothesized role of individual differences. The implications of these findings and individual differences in goal-setting situations are discussed.     

Leader Attributions for Subordinate Performance: Consequences for Subsequent Leader Interactive Behaviors and Ratings1

An important application of attribution theory deals with leader explanations for subordinate performance and their effects on future leader–member interactions and performance. In the present study, subjects worked on a 2-trial task in which there was a leader and 2 members. Leaders received performance feedback and an attributional explanation for subordinate performance after Trial 1, and subsequent Trial 2 behavior was videotaped. Results showed that attributions significantly affected the amount of time spent by the leader talking to the group during the second trial, as well as the number of negative leader comments. Level of performance was a significant determinant of subordinate ratings and reward/punishment recommendations. Attributions differentially affected the punishment advocated by leaders, with failure due to internal causes more likely to be punished than failure due to external causes. Implications for an attributional theory of leadership are discussed.     

Get' em While They Last! Effects of Scarcity Information in Job Advertisements

Participants in Study 1 ( N = 172) were presented with a restaurant server advertisement differing by vacancy availability (scarce vs. plentiful) and scarcity type (number of vacancies vs. time to apply). Companies advertising only a few vacancies available were perceived as paying a significantly higher hourly wage than companies advertising many vacancies available. Also, both vacancy scarcity and time scarcity had positive effects on various company-image perceptions. Study 2 ( N = 181) replicated most of the findings in Study 1 using a different entry-level job advertisement. However, although presentation mode (i.e., advertisement vs. factual) had a main effect on intention to apply, it did not interact with vacancy scarcity.     

A CONCEPTUAL FRAMEWORK FOR UNDERSTANDING RACE, CLASS, GENDER, AND SEXUALITY

Since the mid-1980s, scholarship and college courses that address multiple dimensions of inequality under the rubric of race, class, gender, and (recently) sexuality studies have grown rapidly. Most courses now employ a set of readings, many of which are drawn from a growing number of anthologies. A strength of this approach is its presentation of the diversity of human experiences and the multiplicity of critical perspectives. A weakness is its failure to convey the commonalities in race, class, gender, and sexuality analyses of social reality. To aid in teaching and research on race, class, gender, and sexuality, this article presents six common themes that characterize this scholarship. Race, class, gender, and sexuality are historically and globally specific, socially constructed power relations that simultaneously operate at both the macro (societal) and micro (individual) levels of society. Scholarship in this tradition emphasizes the interdependence of knowledge and activism.     

Using Art in Counseling: Ethical Considerations

Various mental health professionals use, on occasion, drawings and other types of art in therapy, but relatively little has been written on the ethics surrounding this technique. The authors take the position that artwork should be viewed as equivalent to verbal communication. Such equivalency gives rise to a variety of ethical issues that encompass confidentiality, documentation, ownership, research, publication, and display of artwork.     

MULTICOMPONENT INTERVENTION FOR AGITATED BEHAVIOR IN A PERSON WITH ALZHEIMER'S DISEASE

We evaluated a multicomponent intervention for agitated behavior in a man with probable Alzheimer's disease. Hypotheses about variables controlling his agitated behavior guided intervention design. Based on staff interviews, direct observations, and brief experimental probes, intervention components were chosen to increase rate of reinforcement and decrease aversive aspects of his job. Intervention reduced agitated behavior without disrupting his work rate.