Individual payments as a longer-term incentive in online panels

Does it pay to pay online panel members? A three-wave longitudinal experiment was conducted with an online panel to examine whether per person payments, paid through an online intermediary, influence response and retention rates. In the payment condition, participants were promised payment for participation at each wave, whereas control participants were not offered any payment. The promise of a payment had a negative effect on response in Wave 1, but a positive effect on response in Wave 2. Payment had no significant effect on retention. Completing a given wave was an indicator for responding to a subsequent invitation.     

Evaluation of school architecture postoccupancy

A questionnaire for the postoccupancy evaluation of school architecture was developed. It contains distinct modules covering different parts of a school building. A module of the questionnaire comprises a semantic differential section and items covering six content domains which were selected based on a literature review, namely, aesthetics, equipment, room climate, spatial cognition, privacy and publicity, and personalization of and identification with space. The questionnaire is available in the German language and can be used with students age 10 years or older and teachers.     

Effects of dividing attention during encoding on perceptual priming of unfamiliar visual objects

According to the distractor-selection hypothesis (Mulligan, 2003), dividing attention during encoding reduces perceptual priming when responses to non-critical (i.e., distractor) stimuli are selected frequently and simultaneously with critical stimulus encoding. Because direct support for this hypothesis comes exclusively from studies using familiar word stimuli, the present study tested whether the predictions of the distractor-selection hypothesis extend to perceptual priming of unfamiliar visual objects using the possible/impossible object decision test. Consistent with the distractor-selection hypothesis, Experiments 1 and 2 found no reduction in priming when the non-critical stimuli were presented infrequently and non-synchronously with the critical target stimuli, even though explicit recognition memory was reduced. In Experiment 3, non-critical stimuli were presented frequently and simultaneously during encoding of critical stimuli; however, no decrement in priming was detected, even when encoding time was reduced. These results suggest that priming in the possible/impossible object decision test is relatively immune to reductions in central attention and that not all aspects of the distractor-selection hypothesis generalise to priming of unfamiliar visual objects. Implications for theoretical models of object decision priming are discussed.     

Come together: longitudinal comparisons of Pettigrew's reformulated intergroup contact model and the common ingroup identity model in Anglo‐French and Mexican‐American contexts

Both Anglo‐French and Mexican‐American relations are embedded in histories of conflict. Within these intergroup contexts, two longitudinal field studies of contact tested Pettigrew's ( 1998 ) reformulated model of the intergroup contact theory and Gaertner and Dovidio's (2000) Common Ingroup Identity Model (CIIM). In Pettigrew's model, intergroup friendship is accorded a special role and the contact‐bias relation is mediated by changing behaviour, ingroup reappraisal, generating affective ties, and learning about the outgroup. Pettigrew's integration of the three central models of contact generalization into a time‐sequence holds that contact first elicits decategorization, then salient categorization, and finally recategorization. In the CIIM, these three levels of categorization—plus a fourth, dual identity—are conceptualized to be mediators in the contact‐bias relation. Results point to the crucial importance of intergroup friendship and underline the mediating roles of learning about the outgroup, behaviour modification, and generating affective ties, but not ingroup reappraisal in Pettigrew's model. As for the CIIM, in Study 1 interpersonal and intergroup levels were most central, while in Study 2 the dual identity and superordinate group levels were most effective. The implications of the findings are discussed with reference to the likely stability of these effects in different intergroup contexts. Copyright © 2004 John Wiley & Sons, Ltd.     

Busy doing nothing: Evidence for nonaction-effect binding

Research on voluntary action has focused on the question of how we represent our behavior on a motor and cognitive level. However, the question of how we represent voluntary not acting has been completely neglected. The aim of the present study was to investigate the cognitive and motor representation of intentionally not acting. By using an action-effect binding approach, we demonstrate similarities of action and nonaction. In particular, our results reveal that voluntary nonactions can be bound to an effect tone. This finding suggests that effect binding is not restricted to an association between a motor representation and a successive effect (action-effect binding) but can also occur for an intended nonaction and its effect (nonaction-effect binding). Moreover, we demonstrate that nonactions have to be initiated voluntarily in order to elicit nonaction-effect binding.     

Two components and two stages in search performance: a case study in visual search

A model of skilled performance in visual search tasks is presented. According to the model, search behavior is controlled by two memory components. Each of them plays a different role in two stages of search. The two components are the memory representations of the target category and context category, respectively. The two stages are scan and check-for-target. It is argued that the scan is dominantly context-controlled (resulting in target detection) and that the target check is target-controlled (leading to target identification). The model is tested in a transfer experiment. It is shown that the model must be revised to account for two different ways of processing, depending on properties of the stimulus lists: (i) one-stage-scan under target and context control and (ii) scan-and-check processing where checking is target-and-context controlled and scanning is not under memory control at all. Implications of these findings are discussed.     

Integration of information in visual search

Two experiments studied how information about the nontarget items in a visual search task is used for the control of the search. The first experiment used the detection of “hurdle” stimuli to demonstrate that efficient memory representations of the context items can be established within each particular trial. This finding is explained by a model for the short-term integration of context information. The second experiment which varied the complexity of the local but not the global context provided some information about the nature of the integration operations involved. In its final version the model postulates two stages of processing with independent mechanisms of integration. Spatial integration at the first stage deletes repetitions within small samples. Temporal integration at the second stage stores and primes the memory representations of the context items over larger intervals. It is assumed that transient temporal integration within trials is mediated by the same mechanism that underlies permanent temporal integration between trials.     

Peer evaluations of the competence of children vulnerable to psychopathology

Peer evaluations of the behavior of 75 children of schizophrenic mothers, 57 children of depressed mothers, and 153 controls were collected using the Pupil Evaluation Inventory. The children, both boys and girls, were in grades 2 through 9. Both male and female children of schizophrenics were viewed more deviantly than controls on Aggression and Unhappiness-Withdrawal factors. Only the female children of schizophrenics were viewed as less likable than controls. In general, children of schizophrenics did not differ from children of depressives. The exception was the older daughters of schizophrenics, who were rated as more deviant than members of both the remaining groups.This research was supported by grant MH 21145 from the National Institute of Mental Health and by funds from the William T. Grant Foundation.