Visual search through words and nonwords in horizontal and vertical orientations.

In a repeated measurement design, 18 college women searched for target letters in 18 lists of common words, rare words, and nonwords arranged either vertically or horizontally. The mean search time in seconds for three trials in each of six conditions was expected to be significantly slower for nonwords than for words and for vertical orientations than for horizontal orientations. More importantly, a significant interaction was predicted between direction of search and the type of list searched. Results confirmed earlier findings that the two main effects were significant; the significant interaction provided empirical evidence that consideration needs to be given to both intraword redundancy and direction of visual search.     

The Rathus Assertiveness Schedule modified for early adolescents

The 30-item Rathus Assertiveness Schedule was modified for the seventh-grade population using the method of peer ratings. Split-half reliability scores are of moderate to high acceptability (N=108, 0.69<r's<0.81,P's<0.01). The method of peer rating itself attained a moderate to high split-half reliability (N=108, 0.46<r's<0.95,P's<0.01). Correlation of the Modified Rathus Assertiveness Schedule with peer ratings established validity in three of the four experimental populations (P<0.05). The results obtained from the present study are comparable to those obtained by S. A. Rathus (Behavior Therapy, 1973b,4, 398–406).The research for this article was cofunded by the National Interagency Council on Smoking and Health and the American Heart Association of Western New York.     

Leaving patches: An investigation of a laboratory analogue

Five pigeons were trained on a procedure that has been used as a laboratory analogue to natural patch residence. Trials commenced with two responses available. One of these might provide a reinforcer if the patch was a prey patch; the other ended the residence time in the patch and, after a fixed travel time in blackout, produced another patch that might or might not provide a reinforcer. Patch residence also ended, and was followed by the same travel time, after a reinforcer was obtained or after a fixed maximum time was spent in the patch. The dependent variable was patch residence time, from the commencement of the patch to the time at which the subject emitted a response to exit from the patch or until the maximum patch residence time had elapsed. In Parts 1 to 3, the duration of the imposed travel time was varied from 0.25 to 16 s at three different probabilities (.05, .1, and .2) of food per second (λ) in prey patches. As reported in previous research, both increasing travel time and decreasing probabilities of reinforcers per second increased patch residence time. In Parts 4 to 7, the probability of prey trials (ρ) was varied in an irregular order from .1, through .2, .5, and .7, to .9 for different combinations of λ and travel time. Respectively, these were in Part 4, .05 per second and 0.25 s; in Part 5, .05 per second and 16 s; in Part 6, .2 per second and 0.25 s; and in Part 7, .2 per second and 16 s. A previously offered model, based on optimization assumptions, substantially and consistently underpredicted patch residence time. However, a modification of that model, which assumes that the subjects could not accurately discriminate the residence time that provided the minimum interreinforcer interval, described the data well. The same model also described previously reported residence times in a different species with a uniform distribution of prey-arrival times.     

Stimulus control and response bias in an analogue prey-detection procedure

The present study compared the performance of 6 pigeons trained to detect luminance differences in two different signal-detection procedures. Exposed to a three-key array, the pigeons were trained to peck the left key when the brighter of two light intensities had been presented on the center key and to peck the right key when the dimmer of two light intensities had been presented on the center key. Procedure A was a standard signal-detection procedure in which left/bright and right/dim responses produced food reinforcement and left/dim and right/bright responses produced periods of timeout. Procedure B was designed to simulate some of the contingencies operating in a prey-detection situation. Left-key responses produced reinforcement following the brighter center-key stimulus and a period of timeout following the dimmer center-key stimulus. Right-key responses always produced a short period of timeout irrespective of the stimulus. Within each procedure, the duration of timeout arranged for false alarms (left/dim responses) was varied between 3 s and 120 s. Measures of accuracy and response bias were compared between the two procedures. The timeout manipulation produced systematic, but relatively small, changes in these measures when right/dim responses (i.e., correct rejections) produced reinforcement (Procedure A). Arranging timeout for right/dim responses in Procedure B produced greater variability in accuracy and response bias than did arranging reinforcement, but this variability was not related to timeout duration. Overall, discrimination accuracy was considerably higher when right/dim responses produced timeout than when they resulted in reinforcement, and accuracy was accompanied by a large bias toward the response associated with reinforcement. These results are consistent with a recently proposed model of signal detection.     

A longitudinal analysis of the role of task-specific knowledge in the subjective impact and structure of performance

It is widely accepted that the structure of performance depends on the relationship between task demands and information processing resources. This relationship is affected by many factors including practice. For instance, it is claimed that while use of task-specific knowledge, an information-processing resource, may benefit performance in the long term, the costs of its use in the short term are quite high. It is dificult to find any studies which can be used to test this claim, as those which have been undertaken typically measure gross performance only, lack any measure of the subjective costs of resource investment, and are of relatively short duration. In this paper an experiment is reported which looks at the effects of task-specific knowledge on gross and process performance, and on a number of subjective indices over a longitudinal time frame. The results are discussed in terms of the relationships between the context of performance, the perception of control, and strategies of resource management. Finally, the argument that the data suggest a need for the reconceptualization of demands and resources is mooted and some methodological implications are discussed.     

Individualism and Collectivism: What Do They Have to Do With Counseling?

The author defines individualism and collectivism before examining how they are integral parts of the counseling process for clients and counselors. Although individualism has been assumed to be the norm for the counseling culture in the United States, recent work notes the influence of collectivism on professionals and clients in the counseling system. El autor define el individualismo y el colectivismo antes de examinar cómo ellos son partes esenciales del proceso que aconseja para clientes y consejeros. Aunque el individualismo se haya asumido para ser la norma para la cultura que aconseja en los Estados Unidos, el trabajo reciente nota la influencia del colectivismo en profesionales y clientes en el sistema que aconseja.     

Genetic Counselors' Experiences with Paternal Involvement in Prenatal Genetic Counseling Sessions: An Exploratory Investigation

Limited research exists concerning male partners' participation in prenatal genetic counseling (R. Kenen, A. C. M. Smith, C. Watkins, & C. Zuber-Pitore, J. Genet Corns 9, 33–45, 2000). To further understand paternal participation, we interviewed 17 experienced prenatal genetic counselors to assess their perspectives on this issue. We investigated 6 research questions: 1) How do genetic counselors define paternal involvement, 2) how do they determine and address problematic involvement, 3) what factors influence involvement, 4) was paternal involvement addressed in training, 5) how might training be improved, and 6) how do participant strategies for addressing involvement compare to those of marriage/family therapists? Qualitative analysis revealed that 1) participants regard paternal involvement asimportant; 2) most address problematic involvement with strategies similar to those of marital/family therapists; 3) influential factors include male partner's characteristics, the couple's relationship (including culturalpractices), and pregnancy factors; and 4) participants received little or notraining on paternal involvement and recommended didactic and experientialactivities. Implications and research recommendations are presented.