The Representation of Arithmetic Facts in Memory: Results from Retraining a Brain-Damaged Patient

This single case study was designed to gather evidence regarding whether the mental representations mediating multiplication fact retrieval make use of single or multiple codes. MC is a brain-damaged volunteer whose numerical processing impairments were limited to multiplication fact retrieval. He relearned three sets of multiplication facts. Each set was relearned in one of three input formats: Arabic, written verbal, or spoken verbal. Following training all facts were tested in all input formats. MC's posttraining performance was virtually error free and showed no effects of input format. However, reaction-time data showed fact retrieval was fastest when the training format matched the test format. Results are discussed in relation to single- and multiple-code models of multiplication fact retrieval.     

Diagnostic judgments as a function of client and therapist race

The purpose of the present investigation was to examine the process of differential evaluation of clients as a function of client and therapist race. It was hypothesized that race of client and therapist would interact, influencing the judgments of client psychopathology, appropriateness for therapy, verbal facility, and likelihood of treatment success despite standardization of the clinical stimuli. Graduate students in clinical psychology and with varying levels of training (i.e., 1 to 5 years) were asked to rate videotaped interviews of clients in which race of the client and level of psychopathology (i.e., normal, neurotic, and psychotic) were systematically varied. There were significant differences in ratings as a function of race of client, race of therapist, and level of psychopathology observed. Black clients were not rated differently on degree of psychopathology but were rated as less verbally skilled and less appropriate for treatment but more likely to benefit from treatment than white clients. Contrary to expectations, white therapists tended to underrate the pathology of black clients. On the other hand, black therapists tended to overrate the pathology of white clients and made mixed judgments of black clients. The implications of these findings are discussed.This study was supported in part by NIMH Research Centers in Minority Institutions (RCMI) Grant G12RR03206-2.     

What makes interruptions disruptive? A study of length,similarity, and complexity

Summary Classic work on interruptions by Zeigarnik showed that tasks that were interrupted were more likely to be recalled after a delay than tasks that were not interrupted. Much of the literature on interruptions has been devoted to examining this effect, although more recently interruptions have been used to choose between competing designs for interfaces to complex devices. However, none of this work looks at what makes some interruptions disruptive and some not. This series of experiments uses a novel computer-based adventure-game methodology to investigate the effects of the length of the interruption, the similarity of the interruption to the main task, and the complexity of processing demanded by the interruption. It is concluded that subjects make use of some form of non-articulatory memory which is not affected by the length of the interruption. It is affected by processing similar material however, and by a complex mentalarithmetic task which makes large demands on working memory.     

The consistency and structure of aspect-based career preferences

Career aspects (e.g., work environment, using verbal ability, length of training, teamwork) are an elaboration and extension of vocational interests. Aspect-based preferences can serve individuals and their career counselors only if they are reliable and stable. Study 1 estimated the two-week test–retest reliability of 213 college freshmen's preferences in 31 career aspects and the two-year stability of these preferences for 132 of these freshmen. The two-week reliability and the two-year stability of both the within-aspect preferred levels (e.g., “only indoors” most preferred, but “mostly indoors” is also acceptable) and the aspect importance were tested for each of the aspects. The interquartile ranges of the two-week reliability of the aspect importance and of the preferred within-aspect levels were .54–.62 and .63–.74 for the 31 aspects; the interquartile ranges of the two-year stabilities were .38–.48 and .48–.59, respectively. These interquartile ranges reflect the variance in consistency among the aspects. Study 2 explored the structure of the aspects based on the pattern of associations among them. In addition, it examined the consistency of the aspect structures by comparing them in four samples (total N = 40,313). The structure was found consistent across time (Spearman r_s = .88, .76 and .68, two weeks, two years, and 20 years later, respectively), within culture (r_s = .75 and .76, for women and men, respectively), and across cultures (USA and Israel; r_s = .64). Theoretical and practical implications are discussed.     

Inhibition, Contextual Segregation, and Subject Strategies in List Method Directed Forgetting

This experiment tested alternative explanations of list method directed forgetting effects. Two word lists were studied by 135 subjects. Between lists, subjects were instructed to remember both lists (remember group), remember both lists as well as in which list words were studied (segregate group), or to forget the first list and remember the second (forget group). All subjects took both recall and recognition tests with test order varied between subjects. Among subjects who took the recall test first, the forget group showed a directed forgetting effect (poorer performance on List 1 than List 2) with both recall accuracy, recall typing time, and recognition reaction time measures. Contextual segregation of List 1 words by forget subjects was ruled out as a sufficient cause of the effect. Limited support was obtained for a differential rehearsal explanation of the effect. Within-group comparisons and findings of release from directed forgetting support inhibitory processes as the major cause of the directed forgetting effect.     

Scalable choice models

Two representational criteria for probabilistic choice models are studied. These criteria, called scalability and weak scalability, are shown to be characterized by behavioral axioms designated, respectively, as pairwise dependence and weak pairwise dependence. The former is shown to be equivalent to the order independence axiom of Tversky. In addition, structural conditions on the choice alternatives are established under which all axioms are equivalent.     

The psychological health of employed and unemployed recent graduates as a function cognitive appraisal and of coping

In the literature on the effects of unemployment on graduates two competing hypothesis have found support. On one hand graduates have higher expectations about status and occupational identity, hence being unemployed should be more distressing. On the other hand graduates have access to more personal and situational resources and should cope better with the stress of unemployment. In a study of 181 recent graduates it was found that those who were employed (n = 88) scored higher on both somatization and interpersonal sensitivity than those who were unemployed (n = 93). A large percentage also reported not being in the job to which they aspired and scored low on job commitment. The unemployed graduates had a more positive approach to problem-solving, higher achievement motivation, more perceived social support, were more assertive, and felt less hopeless than their employed peers. They also engaged in more constructive leisure activities than the employed group. The data provide tentative support for the hypothesis that graduates are better at coping with unemployment. However the indication is that any advantage to be gained is relative to the type of job occupied by the employed group to whom they are compared. The general conclusion is that opting for a job which does not meet expectations or aspirations may be more psychologically damaging in the short term than being unemployed and hopeful. This is a function of the individual's vulnerability or resistance to stress and highlights the need for graduates to be prepared more effectively for the path to a career.     

Are Better Workers Also Better Humans? On Pharmacological Cognitive Enhancement in the Workplace and Conflicting Societal Domains

The article investigates the sociocultural implications of the changing modern workplace and of pharmacological cognitive enhancement (PCE) as a potential adaptive tool from the viewpoint of social niche construction. We will attempt to elucidate some of the sociocultural and technological trends that drive and influence the characteristics of this specific niche, and especially to identify the kind of capabilities and adaptations that are being promoted, and to ascertain the capabilities and potentialities that might become diminished as a result. In this context, we will examine what PCE is, and how and why it might be desirable as a tool for adaptation within the workplace. As human beings are, or at least should be allowed to be, more than merely productive, able-bodied and able-minded workers, we will further examine how adaptation to the workplace niche could result in problems in other domains of modern societal life that require the same or other cognitive capabilities. In this context we will also focus on the concept of responsibility and how it pertains to PCE and the modern workplace niche. This will shed some light on the kind of trends related to workplace niche construction, PCE and capability promotion that we can expect in the future, and on the contexts in which this might be either beneficial or detrimental to the individual as a well-rounded human being, and to other members of society.