A daily diary study of internalised weight bias and its psychological,eating and exercise correlates

Objective: The current investigation extends ecological momentary assessment (EMA) and daily diary weight stigma research in internalised weight bias (IWB). This investigation used daily diaries to examine the relationship between IWB, mood, coping, body appreciation, exercise behaviours and eating behaviours. Design: The study sample consisted of individuals who were overweight or obese (85% female) with M_BMI?=?36.0, SD_BMI?=?6.2. Participants completed a daily diary each evening and wore a Fitbit for 30 days. Main Outcome Measures: Participants reported on IWB, mood, coping, body appreciation, exercise behaviours and eating behaviours.

Results: Both within- and between-subjects IWB were significantly related to positive affect, negative affect, several coping responses, body appreciation, eating behaviours and the urge to avoid exercise. Exploratory analyses indicated that positive and negative affect mediated many of the associations between IWB and coping responses, body appreciation, and eating and exercise behaviours.

Conclusion: This investigation provides evidence that IWB experiences have daily impacts on psychological well-being, body appreciation, coping, eating and exercise behaviours. Also, this study raises awareness about IWB and its potential impact on psychological well-being and health behaviours.     

Gruesomeness conveys formidability: Perpetrators of gratuitously grisly acts are conceptualized as larger,stronger, and more likely to win

While associated with extreme terrorist organizations in modern times, extensive accounts of grisly acts of violence exist in the archeological, historical, and ethnographic records. Though reasons for this dramatic form of violence are multifaceted and diverse, one possibility is that violence beyond what is required to win a conflict is a method by which violent actors communicate to others that they are formidable opponents. The formidability representation hypothesis predicts that formidability is cognitively represented using the dimensions of envisioned bodily size and strength. We tested the informational ramifications of gruesome acts using two vignette studies depicting individuals who either did or did not grievously damage the corpse of a deceased foe. Participants rated the individual's height, bodily size, and strength, as well as his aggressiveness, motivation, and the capacity to vanquish opponents in future conflicts. Results indicate that, as predicted, committing gruesome acts of violence enhances perceptions of formidability as measured both by envisioned bodily size and strength and expectations regarding the outcomes of agonistic conflicts. Moreover, the gruesome actor was perceived as more aggressive and more motivated to overcome his enemies, and this mediated the increase in conceptualized size and strength. These results both provide further evidence for the formidability representation hypothesis and support the thesis that overtly grisly violence is tactically employed, in part, because it conveys information about the perpetrator's formidability.     

Reverse correlation in neurophysiology

This article presents a review of reverse correlation in neurophysiology. We discuss the basis of reverse correlation in linear transducers and in spiking neurons. The application of reverse correlation to measure the receptive fields of visual neurons using white noise and m-sequences, and classical findings about spatial and color processing in the cortex resulting from such measurements, are emphasized. Finally, we describe new developments in reverse correlation, including “sub-space” and categorical reverse-correlation. Recent results obtained by applying such methods in the orientation, spatial-frequency and Fourier domains have revealed the importance of cortical inhibition in the establishment of sharp tuning selectivity in single neurons.