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BACKGROUND/OBJECTIVE: Bedtime procrastination is a prevalent cause of sleep deprivation, but little is known about why people delay their bedtimes. In the present research, we conducted a qualitative study with bedtime procrastinators to classify their self-reported reasons for later-than-intended bedtime. PARTICIPANTS: Participants (N = 17) were selected who frequently engaged in bedtime procrastination, but whose sleep was not otherwise affected by diagnosed sleep disorders or shift work. METHOD: We conducted in-depth, semistructured interviews and used thematic analysis to identify commonly recurring themes in the interviews. RESULTS AND CONCLUSIONS: Three emerging themes were identified: deliberate procrastination, mindless procrastination, and strategic delay. For the form of procrastination we classified as deliberate procrastination, participants typically reported wilfully delaying their bedtime because they felt they deserved some time for themselves. For the category of mindless procrastination, a paradigmatic aspect was that participants lost track of the time due to being immersed in their evening activities. Finally, participants who engaged in strategic delay reported going to bed late because they felt they needed to in order to fall asleep (more quickly), which suggests that despite describing themselves as “procrastinating,” their bedtime delay may actually be linked to undiagnosed insomnia. The conceptual distinctions drawn in this paper deepen our understanding of bedtime delay and may be helpful for designing effective interventions.

Radboud Universiteit Nijmegen, 17 maart 2015, Promotor : Wigboldus, D.H.J. Co-promotor : Langner, O., Contains fulltext : 143201.pdf (publisher's version ) (Open Access)

Contains fulltext : 128034-OA.pdf (publisher's version ) (Open Access), Asch's seminal research on "Forming Impressions of Personality'' (1946) has widely been cited as providing evidence for a primacy-of-warmth effect, suggesting that warmth-related judgments have a stronger influence on impressions of personality than competence-related judgments (e. g., Fiske, Cuddy, & Glick, 2007; Wojciszke, 2005). Because this effect does not fit with Asch's Gestalt-view on impression formation and does not readily follow from the data presented in his original paper, the goal of the present study was to critically examine and replicate the studies of Asch's paper that are most relevant to the primacy-of-warmth effect. We found no evidence for a primacyof- warmth effect. Instead, the role of warmth was highly context-dependent, and competence was at least as important in shaping impressions as warmth.

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Contains fulltext : 102912.pdf (publisher's version ) (Closed access), Agentic female leaders risk social and economic penalties for behaving counter-stereotypically (i.e., backlash; Rudman, 1998), but what motivates prejudice against female leaders? The status incongruity hypothesis (SIH) proposes that agentic women are penalized for status violations because doing so defends the gender hierarchy. Consistent with this view, Study 1 found that women are proscribed from dominant, high status displays (which are reserved for leaders and men); Studies 2-3 revealed that prejudice against agentic female leaders was mediated by a dominance penalty; and in Study 3, participants' gender system-justifying beliefs moderated backlash effects. Study 4 found that backlash was exacerbated when perceivers were primed with a system threat. Study 5 showed that only female leaders who threatened the status quo suffered sabotage. In concert, support for the SIH suggests that backlash functions to preserve male dominance by reinforcing a double standard for power and control.

Contains fulltext : 103085.pdf (publisher's version ) (Open Access)

Contains fulltext : 102966.pdf (publisher's version ) (Open Access), Recent research suggests that heterosexual men's (but not heterosexual women's) cognitive performance is impaired after an interaction with someone of the opposite sex (Karremans et al., 2009). These findings have been interpreted in terms of the cognitive costs of trying to make a good impression during the interaction. In everyday life, people frequently engage in pseudo-interactions with women (e.g., through the phone or the internet) or anticipate interacting with a woman later on. The goal of the present research was to investigate if men's cognitive performance decreased in these types of situations, in which men have little to no opportunity to impress her and, moreover, have little to no information about the mate value of their interaction partner. Two studies demonstrated that men's (but not women's) cognitive performance declined if they were led to believe that they interacted with a woman via a computer (Study 1) or even if they merely anticipated an interaction with a woman (Study 2). Together, these results suggest that an actual interaction is not a necessary prerequisite for the cognitive impairment effect to occur. Moreover, these effects occur even if men do not get information about the woman's attractiveness. This latter finding is discussed in terms of error management theory.

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Contains fulltext : 77079.pdf (author's version ) (Open Access)