Abstract The present study explores the effect of exposure to news in a social media environment on people’s perceived knowledge and on the “Illusion of knowledge” —that is, the overestimation of perceived knowledge relative to actual knowledge. Using a mixed, within-subjects design, participants ( N = 828) engaged in a two-session study featuring pre- and post-exposure assessments. Participants scrolled through a social media newsfeed and completed assessments of perceived and actual knowledge. We hypothesized that (1) social media exposure would increase perceived knowledge, (2) this increase would not align with actual knowledge, and (3) higher topic involvement would exacerbate these effects. While most of the preregistered hypotheses did not receive clear statistical support, some effects were consistent with our predictions. Perceived knowledge increased over time, suggesting a general exposure effect; however, differences between exposed and non-exposed topics were not statistically significant, possibly due to test effects or limited engagement with the platform. A strong illusion of knowledge was observed across topics, suggesting robust overestimation. This high baseline may have created a ceiling that constrained the detection of exposure effects. This study was conducted as a Registered Report ( https://doi.org/10.24072/pci.rr.100986 ), accepted in principle prior to data collection. To our knowledge, it represents one of the most ecologically valid attempts in the literature to simulate social media exposure in an experimental setting.

Contrary to the claim that loneliness routinely impairs the decoding of social cues such as emotion displays, Knowles, Lucas, Baumeister, and Gardner (2015) proposed that lonely adults “choke under pressure,” experiencing impairments only when social monitoring is framed as diagnostic of general social skill. In four experiments, Knowles et al. showed that lonely individuals performed worse than nonlonely individuals at decoding social cues when the decoding task was framed as a test of social aptitude, but not when it was framed as a test of academic aptitude. The studies were small (N's ranging from 78 to 203), and all employed a convenience sample of mostly female undergraduate students, impairing both statistical power and external validity. In addition, the lack of a true control group precluded the studies from establishing whether loneliness inhibits social monitoring ability if no frame is offered. This study conceptually replicates the central hypothesis of Knowles et al. using a sample of adults that is substantially larger and more diverse demographically and geographically, and using a true control group in addition to the comparison group. Results revealed a significant main effect of loneliness on social monitoring ability but did not replicate the choking under pressure phenomenon.

Previous research has asserted that individuals hold cognitive associations between the constructs of hot temperatures and aggression. However, subsequent studies have cast doubt on whether these previously used methods reliably produce effects that support this assertion. Thus, the evidence for the existence of a cognitive heataggression association is mixed. To test for this hypothetical association using a different method, and to address shortcomings in the previously-used methods, the current studies used a modified Affect Misattribution Procedure to examine whether exposure to heatrelated words increased the accessibility of aggressive cognitions. Both a pilot study and a Registered Report showed that exposure to heat-related words increased the accessibility of aggressive cognitions. However, exposure to cold-related words also, and unexpectedly, increased the accessibility of aggressive cognitions. In addition, these results were only found for participants who reported that the primes influenced their Misattribution Task performance. Thus, although the current results found that exposure to heat-related stimuli caused theoretically predicted effects, the overall evidence is somewhat mixed as to whether this is due to a cognitive association between hot temperatures and aggression.

Considerable evidence attests to a relationship between executive function and falls. Notable among cognitive elements related to fall risk is the ability to suppress a highly automatic but unwanted action—that is, response inhibition. Although the ability to stop may seem like an unlikely foundation for maintaining balance, there are many situations in daily life where the ability to adapt planned action is critical to reducing instability. Most of what we know about the role of inhibition in balance control is based on correlations between cognitive test performance and self-reported falls, leaving a sizable gap in understanding mechanisms linking inhibition and balance control. Here, we expand from traditional balance assessments that accentuate reflexive action and instead impose a need to suppress a prepotent balance recovery step. We leveraged techniques developed in cognitive neuroscience to expose neuromuscular events leading to successful inhibition. Specifically, we used high-density electroencephalography to measure neural markers previously shown to predict successful inhibition in seated voluntary reaction tasks using hand responses (ß-bursts) and applied this to a balance recovery step task. Contrary to our hypothesis, higher ß-burst volume after a stop cue was associated with failed step suppression. Other ß oscillation characteristics revealed slightly earlier ß-burst onsets in successful suppression trials and higher average ß power prior to the stop signal for successful versus failed stop trials. The current study offers insight into potential key markers underlying suppression of a recovery step, and we highlight unique challenges associated with studying cognitive processes during rapid, whole-body balance recovery.