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Despite the recent proliferation of research on media multitasking, a comprehensive meta‐analytic review of its effects has not been available. Based on a review of 49 media multitasking studies, this meta‐analysis showed that multitasking has negative effects on cognitive outcomes, whereas it has positive effects on attitudinal (or persuasion‐related) outcomes. Moderator analyses suggested that the negative effects of multitasking on cognitive outcomes varied by (a) user control, (b) task relevance, and (c) task contiguity. Specifically, multitasking had greater effects (a) when media users had less control over the media, (b) for tasks that were unrelated, and (c) for tasks that were physically distant. Implications for future multitasking research are further discussed. 相似文献
115.
The postural sway patterns of newly standing infants were compared under two conditions: standing while holding a toy and standing while not holding a toy. Infants exhibited a lower magnitude of postural sway and more complex sway patterns when holding the toy. These changes suggest that infants adapt postural sway in a manner that facilitates visually fixating on and stabilizing the toy in their hand. When simply standing, infants exhibited postural sway patterns that appeared to be more exploratory in nature. Exploratory sway patterns may allow infants to learn the affordances of their new standing posture. These results demonstrate that newly standing infants are capable of task-dependent postural control. 相似文献
116.
Epigenetic mechanisms have recently been known to play fundamental roles in the regulation of synaptic plasticity, and learning and memory tasks in many brain regions, such as the hippocampus, the amygdala, the insular cortex. However, epigenetic mechanism in the medial prefrontal cortex (mPFC), also a crucial neural locus for the control of cognition and emotion, is not well known. The present study investigated the epigenetic regulation of two genes, reelin and brain-derived neurotrophic factor (bdnf), both play important roles in neural plasticity, in the mPFC. The data showed that the levels of total DNA methyltransferase (DNMTs), total histone acetyltransferases (HATs), global acetylated histone 3 (H3) and global acetylated histone 4 (H4) were all changed with the induction of long-term potentiation (LTP) in the mPFC, implying that DNA methylation and histone acetylation may involve in synaptic plasticity in the mPFC. The present results further demonstrated that the demethylation status of reelin and bdnf, and acetylated H3 and acetylated H4 at the reelin and the bdnf promoters in the mPFC were enhanced by the delivery of LTP-inducing high-frequency stimulation (HFS). Consistently, infusion of DNMT inhibitor, 5-azacytidine (5-azaC), or histone deacetylases (HDACs) inhibitor, sodium butyrate (NaB), into the mPFC could interfere with LTP-associated demethylation and acetylation of reelin and bdnf genes, and the induction of LTP as well. Long-term retention of trace fear memory, which is dependent on mPFC function, was also altered by administration of these inhibitors into the mPFC. These findings suggest that epigenetic regulation of DNA demethylation and histone acetylation of target genes, such as reelin and bdnf, might underlie the mechanisms of synaptic plasticity and memory retention in the mPFC. 相似文献
117.
Matthews Russell A. Pineault Laura Hong Yeong‑Hyun 《Journal of business and psychology》2022,37(4):873-873
Journal of Business and Psychology - 相似文献
118.
Han DH Kim YS Lee YS Min KJ Renshaw PF 《Cyberpsychology, behavior and social networking》2010,13(6):655-661
Brain responses, particularly within the orbitofrontal and cingulate cortices, to Internet video-game cues in college students are similar to those observed in patients with substance dependence in response to the substance-related cues. In this study, we report changes in brain activity between baseline and following 6 weeks of Internet video-game play. We hypothesized that subjects with high levels of self-reported craving for Internet video-game play would be associated with increased activity in the prefrontal cortex, particularly the orbitofrontal and anterior cingulate cortex. Twenty-one healthy university students were recruited. At baseline and after a 6-week period of Internet video-game play, brain activity during presentation of video-game cues was assessed using 3T blood oxygen level dependent functional magnetic resonance imaging. Craving for Internet video-game play was assessed by self-report on a 7-point visual analogue scale following cue presentation. During a standardized 6-week video-game play period, brain activity in the anterior cingulate and orbitofrontal cortex of the excessive Internet game-playing group (EIGP) increased in response to Internet video-game cues. In contrast, activity observed in the general player group (GP) was not changed or decreased. In addition, the change of craving for Internet video games was positively correlated with the change in activity of the anterior cingulate in all subjects. These changes in frontal-lobe activity with extended video-game play may be similar to those observed during the early stages of addiction. 相似文献
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Young audiences frequently combine media use (e.g., television viewing) with other activities (e.g., homework); this is referred to as multitasking. This research uses longitudinal data to examine the moderating role of multitasking by examining the effects of exposure to sexual content in the media on adolescents' sexual behavior. Consistent with the predictions based on the limited capacity approach, there was a significant multitasking by exposure interaction suggesting that multitasking reduces the impact of media. More specifically, the effect of exposure to sexual content in the media on sexual behavior was significantly greater among light multitaskers than among heavy multitaskers. 相似文献
120.
Although the inhibiting effects of multitasking can be explained by 2 components, capacity interference (CI) and structural interference (SI), studies that have specifically focused on SI are limited. Thus, the present study examined the effects of SI in persuasion using 2 experimental studies. Results of Study 1 showed that SI (not CI) reduced both comprehension and counterarguing. In addition, results of Study 2 showed that SI effects occur not only in single-channel multitasking but also in dual-channel multitasking, and that SI effects occur not only when content interference is high (language-based multitasking) but also when it is low (non–language-based multitasking). The role of SI in multitasking effects has important implications for research on audience behaviors and persuasive communication. 相似文献