Position-dependent and position-independent attention shifts: Evidence against the spotlight and premotor assumption of visual focussing

Summary One implication of the spotlight metaphor of visual-attention shifts is that attention moves from position to position, from one object in the visual field to another. According to this view, attention shifts start at the last-focussed position, their spatiotemporal course therefore being position dependent. A different, yet also position-dependent, formulation is implied in the so-called premotor hypothesis of attention (Rizzolatti et al., 1987; Umiltà et al., 1991). In this paper these two accounts are tested against an alternative, position-independent conception. It is maintained that in the case of onset-triggered processes, the course of the attentional shifts is independent of the last-focussed position.On the basis of these considerations, three experiments measure choice-reaction times of stimuli at different spatial positions after peripheral cuing of the same or another position within the visual field. Results show no evidence for the position-dependent conception of the spotlight metaphor or the premotor hypothesis with a long SOA (stimulus-onset asynchrony) between cue and stimulus. Only with a short SOA is the premotor hypothesis supported by the data. As an alternative interpretation, a position-independent thesis is favored, in which it is assumed that attention shifts can be adjusted during an early stage of processing.     

Perceptual and attentional factors in encoding irrelevant spatial information

Numerous studies found superior performance when the irrelevant location of a stimulus and response location were corresponding than when they were not corresponding (Simon effect), suggesting that stimulus location is processed in an obligatory manner. The present study compared Simon effects from the location of a relevant (i.e., to-be-attended) object to those from the location of an irrelevant (i.e., to-be-ignored) object. In four experiments, participants were presented with a rectangular frame and a square, with the relevant object in green or red color and the irrelevant object in gray or white color. Participants’ task was to respond with a lateral keypress to the color of the relevant object, and we varied spatial correspondence between the location of the relevant or the irrelevant object and the response, respectively. Results consistently showed larger Simon effects from the location of the relevant than from the irrelevant object, even when the irrelevant object was made very salient. These results suggest that location processing is largely confined to relevant (i.e., attended) objects, stressing the role of attention shifts for location encoding.     

The development of hazard perception: Dissociation of visual orientation and hazard processing

Eye movements are a key behavior for visual information processing in traffic situations and for vehicle control. Previous research showed that effective ways of eye guidance are related to better hazard perception skills. Furthermore, hazard perception is reported to be faster for experienced drivers as compared to novice drivers. However, little is known whether this difference can be attributed to the development of visual orientation, or hazard processing. In the present study, we compared eye movements of 20 inexperienced and 20 experienced drivers in a hazard perception task. We separately measured (a) the interval between the onset of a static hazard scene and the first fixation on a potential hazard, and (b) the interval between the first fixation on a potential hazard and the final response. While overall RT was faster for experienced compared to inexperienced drivers, the scanning patterns revealed that this difference was due to faster processing after the initial fixation on the hazard, whereas scene scanning times until the initial fixation on the hazard did not differ between groups.     

Response Time Modeling Based on the Proportional Hazards Model

Tests of personality, interests, intelligence, and academic achievement were administered by 271 Ss. The data were processed by the principal component method of factor analysis. Twelve second-order factors were extracted and interpreted after oblique maxplane rotation.     

Exploring the Role of Alternative Perceived Performance Measures and Needs-Congruency in the Consumer Satisfaction Process

Prior research suggests that perceived performance of a product or a service is directly linked to postpurchase satisfaction. We argue that this causal relationship might be a measurement artifact and/or insufficient modeling of the satisfaction process rather than an accurate assessment of how consumers form satisfaction judgments. To test our hypotheses, a 2 x 2 x 2 (Performance x Expectations x Needs) factorial design was used with 2 types of perceived performance measures (value-laden and objective). The findings demonstrate that the observed direct link from perceived performance to overall satisfaction diminishes when more objective perceived performance indicators replace the commonly used value-laden measures. Furthermore, desire-congruency was found to contribute independently to satisfaction over and above a disconfirmation-of-expectations standard. In fact, desire-congruency was found to be a better predictor of satisfaction than disconfirmation-of-expectations. Finally, our results suggest that the direct performance–satisfaction link becomes insignificant when the modeling of the satisfaction process is improved. Taken together, these findings support the view that the frequently observed high correlations between perceived performance and satisfaction might be a reflection of the type of measures used and/or insufficient capturing of the evaluative process leading to satisfaction, rather than support for a direct causal link.     

How temporal distance from past selves influences self‐perception

The present studies examine how perceived temporal distance from past selves influences perceptions of the current self. Participants recalled their past self either at age 9 or 15. These two past selves differ in levels of identification with gender and thus denote different standards of comparison. Three hypotheses were tested. Temporal distance should determine whether recalled past selves produce assimilation or contrast effects on the current self. Second, temporal comparison effects should be weaker when people recall their past in terms of stable, relatively enduring characteristics (e.g. traits). Third, past selves should to a greater extent be biased by stereotypical knowledge about former lifetime periods the farther away individuals feel from past selves. Past selves coloured by stereotypical knowledge are more extreme and should thus produce stronger judgemental effects on the current self. The results supported the hypotheses. Implications for autobiographical remembering are discussed. Copyright © 2007 John Wiley & Sons, Ltd.     

Developing a model of adolescent friendship formation on the internet.

Previous research has been largely silent about what precisely influences online friendship formation and has ignored motives for online communication as potential explanations. Drawing on a sample of 493 adolescents, this study tested a path model of adolescent friendship formation including as predictors introversion/extraversion, online self-disclosure, motive for social compensation, and frequency of online communication. Our path analysis showed that extraverted adolescents self-disclosed and communicated online more frequently, which, in turn, facilitated the formation of online friendships. Introverted adolescents, by contrast, were more strongly motivated to communicate online to compensate for lacking social skills. This increased their chances of making friends online. Among introverted adolescents, a stronger motive for social compensation also led to more frequent online communication and online self-disclosure, resulting in more online friendships. The model suggests that the antecedents of online friendship formation are more complex than previously assumed and that motives for online communication should be studied more closely.     

The influence of sexually explicit Internet material and peers on stereotypical beliefs about women's sexual roles: similarities and differences between adolescents and adults

Previous research on the influence of sexually explicit Internet material (SEIM) on adolescents' stereotypical beliefs about women's sexual roles has three shortcomings. First, the role of peers has been neglected; second, stereotypical beliefs have rarely been studied as causing the use of SEIM and the selection of specific peers; and third, it is unclear whether adolescents are more vulnerable to the effects of SEIM than adults. We used data from two nationally representative two-wave panel surveys among 1,445 Dutch adolescents and 833 Dutch adults, focusing on the stereotypical belief that women engage in token resistance to sex (i.e., the notion that women say "no" when they actually intend to have sex). Structural equation modeling showed that peers who supported traditional gender roles elicited, both among adolescents and adults, stronger beliefs that women use token resistance to sex. Further, the belief that women engage in token resistance predicted adolescents' and adults' selection of gender-role traditional peers, but it did not predict adolescents' and adults' use of SEIM. Finally, adults, but not adolescents, were susceptible to the impact of SEIM on beliefs that women engage in token resistance to sex.     

Characteristics and motives of adolescents talking with strangers on the internet.

Despite widespread concerns about the dangers of adolescents' online communication with strangers, we know little about (a) which types of adolescents talk with strangers and (b) what motivates them to do so. Drawing on a survey among 412 Dutch adolescents, we found that early adolescents (12-14-year-olds) were most prone to talk with strangers on the internet. If adolescents communicated online more frequently, they less often talked with strangers on the internet. However, if adolescents engaged in long chat sessions, they tended to talk with strangers on the internet more often. In contrast to earlier research, introversion was not related to adolescents' tendency to talk with strangers. The motives of entertainment, meeting new people, and social compensation increased adolescents' online communication with strangers.