On the role of verbalization during task set selection: Switching or serial order control?

Recent task-switching work in which paper-and-pencil administered single-task lists were compared with task-alternation lists has demonstrated large increases in task-switch costs with concurrent articulatory suppression (AS), implicating a crucial role for verbalization during switching (Baddeley, Chincotta, & Adlam, 2001; Emerson & Miyake, 2003). Experiment 1 replicated this result, using computerized assessment, albeit with much smaller effect sizes than in the original reports. In Experiment 2, AS interference was reduced when a sequential cue (spatial location) that indicated the current position in the sequence of task alternations was given. Finally, in Experiment 3, switch trials and no-switch trials were compared within a block of alternating runs of two tasks. Again, AS interference was obtained mainly when the endogenous sequencing demand was high, and it was comparable for no-switch and switch trials. These results suggest that verbalization may be critical for endogenous maintenance and updating of a sequential plan, rather than exclusively for the actual switching process.     

Use and Then Prove,or Prove and Then Use? Some Thoughts on the Ethics of Mental Health Professionals' Courtroom Involvement

Psychologists' courtroom involvement and testimony should not be dictated solely by what the judge or court allows but also require the application of personal or professional standards. This article explores various standards that might be used to determine whether psychological evidence is ready for courtroom application, whether or which evaluative procedures should be performed prior to courtroom use, and the potential tensions between personal validation or impression and formal scientific evidence. Although determining just how tough our professional standards ought to be involves complex issues, the field should take a strong stance against testimony that is based largely on personal validation and that lacks scientific support or conflicts with research evidence. Much of current testimony violates this minimal standard.     

Infrahumanization or familiarity? Attribution of uniquely human emotions to the self, the ingroup, and the outgroup

People attribute more secondary emotions to their ingroup than to outgroups. This effect is interpreted in terms of infrahumanization theory. Familiarity also could explain this differential attribution because secondary emotions are thought to be less visible and intense than primary ones. This alternative explanation to infrahumanization was tested in three studies. In Study 1, participants attributed, in a between-participants design, primary and secondary emotions to themselves, to their ingroup, or to an outgroup. In Study 2, participants answered for themselves and their ingroup or for themselves and an outgroup. In Study 3, participants made attributions to the ingroup or a series of outgroups varying in terms of familiarity. The data do not support an explanation in terms of familiarity. The discussion centers on conditions not conducting to infrahumanization.     

On the limits of advance preparation for a task switch: do people prepare all the task some of the time or some of the task all the time?

This study investigated the nature of advance preparation for a task switch, testing 2 key assumptions of R. De Jong's (2000) failure-to-engage theory: (a) Task-switch preparation is all-or-none, and (b) preparation failures stem from nonutilization of available control capabilities. In 3 experiments, switch costs varied dramatically across individual stimulus-response (S-R) pairs of the tasks-virtually absent for 1 pair but large for others. These findings indicate that, across trials, task preparation was not all-or-none but, rather, consistently partial (full preparation for some S-R pairs but not others). In other words, people do not prepare all of the task some of the time, they prepare some of the task all of the time. Experiments 2 and 3 produced substantial switch costs even though time deadlines provided strong incentives for optimal advance preparation. Thus, there was no evidence that people have a latent capability to fully prepare for a task switch.     

The object-line effect: is it attributable to intercontext differences or the structural properties of contexts and task demands?

Briefly presented target lines are reported more accurately when part of an object-like context than alone (Williams & Weisstein, 1978). Efforts to explain this effect have tended to focus on structural properties that contexts must possess in order to be effective in facilitating target-line discrimination (e.g., Weisstein, Williams, & Harris, 1982). Enns and Prinzmetal (1984) take issue with this approach. They propose that contexts differ more from one another than do target lines presented alone, and it is this fact, and not the general structural properties of contexts, that underlies their effectiveness. Two experiments examined intercontext differences and structural factors as determinants of context effectiveness. Subjects were found to use intercontext differences to narrow the range of possible alternatives, but when this factor was controlled, structural properties determined context effectiveness. The structural interpretation of context effectiveness was found not be as straightforward as generally assumed, however. A third experiment showed context effectiveness to be affected by the character of the discrimination task employed.     

Ethnic Diversity and the Use of Humor in Counseling: Appropriate or Inappropriate?

Humor can reflect the healthy release of feelings during the counseling process, the type of emotional release that leads to significant therapeutic gains. It can also be a disturbing distraction, possibly causing early termination, if used inappropriately. Counselors need to exert particular caution before attempting to apply humor in working with a client from a culture different from the counselor's. This article explores the available literature and offers contributions on the subject from 4 “ethnically diverse” perspectives. Finally, a general approach based on existential theory is presented along with 5 general conditions to ascertain the appropriate use of humor.     

Better to be optimistic,mindful, or both? The interaction between optimism,mindfulness, and task engagement

This paper investigates the relationships between optimism, mindfulness, and task engagement. Specifically, we hypothesized that optimism, mindfulness, and their interaction would facilitate individuals’ task engagement. We tested our research model in four studies: two surveys among gig workers and two experiments. The results of the two surveys among gig workers indicated that optimism predicted higher task engagement, but trait mindfulness did not, and that a multiplicative interaction existed between high optimism and high mindfulness in stimulating task engagement. Our two experiments confirmed a significant interaction between optimism and induced state mindfulness and showed that the most engaging situation is being high in both mindfulness and optimism. Although optimism predicted task engagement, the experiments indicated that the effect of the state mindfulness manipulation was above and beyond that of optimism. Finally, we discuss the nuances of the interaction between optimism and mindfulness in predicting task engagement.     

Construct accessibility,depression and the emotional stroop task: Transient mood or stable structure?

Forty-two women who had volunteered for a project on ‘worrying’ were allocated to a ‘high’ or ‘low’ depressed group on the basis of their scores on the Beck Depression Inventory (short-form). High depression was associated with interferences in colour naming of negative compared to neutral words in an emotional Stroop Task, but this effect was more clearly marked when Ss were allocated to groups on the basis of depression levels ascertained 12 months previously. The results strengthen claims made by Gotlib and McCann (1984) that interference in colour naming of negative material reflects stable biases in construct accessibility in depression-prone individuals rather than transient mood disturbance.     

Curriculum tracking and teacher evaluations of individual students: selection, adjustment or labeling?

Past research into the consequences of tracking mainly documented on the impact of attending different tracks on students’ achievement and behavior. Less attention has been paid to the impact of track positions on teachers’ perceptions and expectations regarding students. By means of multi-level analysis of data of 6,545 students in 46 Flemish secondary schools with self-reported student measures and teachers’ evaluations of students, this study examines if teachers’ evaluations of secondary school students’ cognitive capacity, effort in class and diligence in doing homework vary by track, and whether teachers’ perceptions are informed (1) by the typical students’ background features; (2) by the students’ resistance to school; or (3) by labeling of students attending certain tracks. Teachers perceive lower track students as less able and less diligent in doing homework because of students’ social and cognitive characteristics and anti-school behavior. Accounting for the latter, teachers even evaluate lower track students as paying slightly more effort. The implications for future research and social policy are discussed.     

Intent to harm or injure? Gender and the expression of anger

Gender differences in aggressive behaviour but not in anger suggest that women may express anger through behaviours that lack intent to harm or injure. Angry behaviours (injurious and noninjurious) were rated in terms of their likelihood of use when angry (N=888). Confirmatory factor analysis revealed a direct aggression factor and two further scales: explosive acts (e.g. throwing objects when alone) and defusing acts (e.g. talking to a third party). Men exceeded women on direct aggression and explosive acts, whereas women exceeded men on defusing acts. Expressive beliefs about aggression (as a loss of self-control) were higher among women and strongly associated with use of defusing acts and the avoidance of direct aggression. Instrumental beliefs about aggression (as a means of control over others) were higher among men and showed the opposite pattern of associations. We highlight the need for further work on actors' intention in relation to angry behaviours and the impact of context on these intentions.     

Reconfiguration of task-set: Is it easier to switch to the weaker task?

Switching between two tasks afforded by the same stimuli results in slower reactions and more errors on the first stimulus after the task changes. This “switch cost” is reduced, but not usually eliminated, by the opportunity to prepare for a task switch. While there is agreement that this preparation effect indexes a control process performed before the stimulus, the “residual” cost has been attributed to several sources: to a control process essential for task-set reconfiguration that can be carried out only after the stimulus onset, to probabilistic failure to engage in preparation prior to the stimulus, and to two kinds of priming from previous trials: positive priming of the now-irrelevant task set and inhibition of the now-relevant task-set. The main evidence for the carry-over of inhibition is the observation that it is easier to switch from the stronger to the weaker of a pair of tasks afforded by the stimulus than vice versa. We survey available data on interactions between task switching and three manipulations of relative task strength: pre-experimental experience, stimulus-response compatibility, and intra-experimental practice. We conclude that it is far from universally true that it is easier to switch to the weaker task. Either inhibition of the stronger task-set is a strategy used only in the special case of extreme inequality in strength, or its consequences for later performance may be masked by slower post-stimulus control operations for more complex tasks. Inhibitory priming may also be stimulus specific. Received: 31 March 1999 / Accepted: 23 July 1999     

Holistic or compositional representation of two-digit numbers? Evidence from the distance, magnitude, and SNARC effects in a number-matching task

Whether two-digit numbers are represented holistically (each digit pair processed as one number) or compositionally (each digit pair processed separately as a decade digit and a unit digit) remains unresolved. Two experiments were conducted to examine the distance, magnitude, and SNARC effects in a number-matching task involving two-digit numbers. Forty undergraduates were asked to judge whether two two-digit numbers (presented serially in Experiment 1 and simultaneously in Experiment 2) were the same or not. Results showed that, when numbers were presented serially, unit digits did not make unique contributions to the magnitude and distance effects, supporting the holistic model. When numbers were presented simultaneously, unit digits made unique contributions, supporting the compositional model. The SNARC (Spatial-Numerical Association of Response Codes) effect was evident for the whole numbers and the decade digits, but not for the unit digits in both experiments, which indicates that two-digit numbers are represented on one mental number line. Taken together, these results suggested that the representation of two-digit numbers is on a single mental number line, but it depends on the stage of processing whether they are processed holistically or compositionally.     

Do the Concepts of Grammar and Use in Wittgenstein Articulate a Theory of Language or Meaning?

The paper elucidates Wittgenstein's later conception of philosophy as devoid of theories or theses, comprehending this as an articulation of a strategy for avoiding dogmatism in philosophy. More specifically, it clarifies Wittgenstein's conception by using what he says about the concepts of meaning and language as an example and by developing an interpretation that purports to make plain that what Wittgenstein says about these issues does not constitute a philosophical thesis. Adopting Wittgenstein's approach, we can, arguably, have a richer view of meaning and language than a commitment to philosophical theses allows for. I conclude with remarks on the method of analysis in terms of necessary conditions.     

The logic of social exchange: has natural selection shaped how humans reason? Studies with the Wason selection task

In order to successfully engage in social exchange--cooperation between two or more individuals for mutual benefit--humans must be able to solve a number of complex computational problems, and do so with special efficiency. Following Marr (1982), Cosmides (1985) and Cosmides and Tooby (1989) used evolutionary principles to develop a computational theory of these adaptive problems. Specific hypotheses concerning the structure of the algorithms that govern how humans reason about social exchange were derived from this computational theory. This article presents a series of experiments designed to test these hypotheses, using the Wason selection task, a test of logical reasoning. Part I reports experiments testing social exchange theory against the availability theories of reasoning; Part II reports experiments testing it against Cheng and Holyoak's (1985) permission schema theory. The experimental design included eight critical tests designed to choose between social exchange theory and these other two families of theories; the results of all eight tests support social exchange theory. The hypothesis that the human mind includes cognitive processes specialized for reasoning about social exchange predicts the content effects found in these experiments, and parsimoniously explains those that have already been reported in the literature. The implications of this line of research for a modular view of human reasoning are discussed, as well as the utility of evolutionary biology in the development of computational theories.     

Theodicy: The Solution to the Problem of Evil,or Part of the Problem?

Theodicy, the enterprise of searching for greater goods that might plausibly justify God’s permission of evil, is often criticized on the grounds that the project has systematically failed to unearth any such goods. But theodicists also face a deeper challenge, one that places under question the very attempt to look for any morally sufficient reasons God might have for creating a world littered with evil. This ‘anti-theodical’ view argues that theists (and non-theists) ought to reject, primarily for moral reasons, the project of ‘justifying the ways of God to men’. Unfortunately, this view has not received the serious attention it deserves, particularly in analytic philosophy of religion. Taking my cues from such anti-theodicists as Kenneth Surin, D.Z. Phillips and Dostoyevsky’s Ivan Karamazov, I defend several reasons for holding that the way of thinking about God and evil enshrined in theodical discourse can only add to the world’s evils, not remove or illuminate them.

The effects of problem content,instructions, and verbalization procedure on Wason’s selection task

This study examined various hypotheses for facilitation on Wason’s four-card selection task by means of a factorial experiment. The factors were memory cuing vs. nonmemory cuing content, violation vs. true-false instructions, and verbalization procedure. The results indicated that memory cuing content may be a necessary and sufficient condition for facilitation, but that the amount of facilitation is affected by the type of instructions. Verbalization procedure had no effects, but this may have been due to the subjects’ failure to comply completely with the various verbalization instructions. An explanation of the results that assumes that content and instructions determine the cognitive processing load of the task and hence the solution strategies employed is considered.     

Response execution, selection, or activation: What is sufficient for response-related repetition effects under task shifting?

Repetition effects are often helpful in revealing information about mental structures and processes. Usually, positive effects have been observed when the stimuli or responses are repeated. However, in task shift studies it has also been found that response repetitions can produce negative effects if the task shifts. Although several mechanisms have been proposed to account for this interaction between task shifting and response repetition, many details remain open. Therefore, a series of four experiments was conducted to answer two questions. First, are motor responses necessary to produce response-related repetition effects, or is response activation sufficient? Second, does the risk of an accidental re-execution of the last response affect the repetition costs? The results show that response activation alone can produce repetition effects. Furthermore, the risk of accidental response re-execution largely modulates these effects.     

Constructive or cruel? Positive or patronizing? Reactions to expressions of positive and negative stereotypes of the mentally ill

Previous research has shown that people respond with greater sensitivity to negative stereotypical comments about a group that are made from someone outside the group in question than from someone who belongs to the group. In this paper, we investigated if the same effect occurs in response to comments made about stigmatized groups. Specifically, we examined how people react to comments made about the mentally ill. The conditions under which people accept or reject stereotypes of the mentally ill may shed light on the conditions necessary for effective anti-discrimination campaigns. In the current study, participants responded to positive or negative stereotypes of the mentally ill voiced by either someone who has, or has not, suffered from a mental illness. Participants were more sensitive, agreed less, and evaluated the speaker less favourably when comments came from the out-group rather than the in-group source. The effects were strongest for negative comments, however contrary to previous research participants also responded less favourably to positive comments from the out-group source. These reactions were mediated by the perceived constructiveness of the speaker's motives. Implications for the effectiveness of anti-discrimination campaigns are discussed.     

The effect of thematic content on the ‘Wason selection task’

This paper concerns the differential effects of use of ‘thematic’, rather than abstract (symbolic), content on the ‘Wason selection task’. An effect of thematic content has been reported several times, originally by Wason & Shapiro (1971), but Manktelow & Evans (1979) report five experiments that failed to obtain an effect and argue against the validity of the content effect in general. However, it is pointed out that four of their experiments use a novel content and that there are previous reports of non-effective content in the literature. It is concluded that a particular type of thematic content cannot be treated as a ‘random sample’ of thematic content in general, and that their argument thus rests upon their failure to produce an effect of the specific (’towns and transport’) content used by Wason and Shapiro. This produces an essentially empirical controversy which is settled in two ways. First, Manktelow and Evans’s criticisms of two previous replications are shown to be misleading. Second, an experiment is reported that exactly copies the Wason and Shapiro design and produces a significant effect of content. It is concluded that the Manktelow and Evans result most probably was due to a Type 2 error. Finally, a hypothesis is developed to account for both the effect of certain types of content and the lack of effect of others, including that used in Manktelow and Evans’s first four experiments.