Perceived stress increases susceptibility to visual food cues in fast-food menu selections.

Individuals who report perceived stress often eat more unhealthy foods and more calories than those with lower stress levels, though individual differences and contexts are important. This study investigated how visual food cues on fast-food menus may increase calorie consumption intentions due to their potential motivational influences. A 2 (presence or absence of visual cues) x 4 (exemplar fast-food restaurant menu) fractionated experiment administered online (N = 325) indicated that when participants viewed menus with visual cues, they selected a greater number of calories to consume. Additionally, data showed an interaction effect of perceived stress and visual cues revealing that visual elements incentivized participants reporting higher stress to select more calories whereas visual cues did not have this effect for people reporting lower levels of perceived stress. Though important limitations exist, a key takeaway is that food cue exposure is another important factor to consider when predicting how stress may affect eating decisions.

Food as Risk: How Eating Habits and Food Knowledge Affect Reactivity to Pictures of Junk and Healthy Foods.

This study explores how people respond to images of junk versus healthy food as a function of their eating habits and food knowledge. The experiment reported here proposed and tested the idea that those with unhealthy eating habits but highly knowledgeable about healthy eating would feel more positive and also more negative toward junk food images compared to images of healthy food because they may perceive them as risky--desirable but potentially harmful. The psychophysiological data collected from participants during their exposure to pictures of junk versus healthy food supported this idea. In addition, unhealthy eaters compared to healthy eaters with the same degree of food knowledge responded more positively to all food items. The findings are critical from a health communication perspective. Because unhealthy eaters produce stronger emotional responses to images of junk food, they are more likely to process information associated with junk food with more cognitive effort and scrutiny. Thus, when targeting this group and using images of junk food, it is important to combine these images with strong message claims and relevant arguments; otherwise, if the arguments are perceived as irrelevant or weak, the motivational activation associated with junk food itself may transfer into an increased desire to consume the unhealthy product.

Mediated substance cues: motivational reactivity and use influence responses to pictures of alcohol.

This study examined how emotional and physiological responses to pictures of alcoholic or nonalcoholic beverages vary as a function of motivational type and alcohol use. The authors used the limited capacity model of motivated mediated message processing to guide predictions and the motivational activation measure to measure the reactivity of participants' appetitive and aversive motivational systems. Participants viewed and rated 9 pictures of alcoholic beverages and 9 pictures of nonalcoholic beverages. Facial electromyography data were collected during viewing. Overall results show that heavy users respond both more positively and more negatively to pictures of alcoholic beverages than to pictures of nonalcoholic beverages, whereas light users respond more positively overall and more positively to pictures of alcoholic beverages than to pictures of nonalcohol beverages. In addition, heavy use predictably reverses the response predicted by motivational type.

Encoding details: positive emotion leads to memory broadening.

In the current experiment we tested the hypothesis that unlike negative arousal, which leads to memory narrowing effects whereby an increase in memory for the central details is accompanied by a decrease in memory for the peripheral details, positive arousing events might lead to a memory broadening effect such that positive arousal would increase memory for both central and peripheral details. This was assessed by testing recognition for central and peripheral details of pictures that were selected to vary in a continuous manner across a wide range of arousal for both positive and negative items. The results indicated that increases in both positive and negative stimulus arousal levels led to gradual increases in memory for the central aspects of the photos. In contrast, negative arousal first increased then decreased memory for peripheral detail as arousal levels increased, whereas positive arousal led to a continuous increase in memory for peripheral details. Thus, arousing negative materials lead to memory narrowing, whereas arousing positive materials can lead to memory broadening.

Individual differences in motivational activation influence responses to pictures of taboo products.

In this article, the authors investigated responses to pictures of products whose use is socially or legally restricted for teens and young adults (e.g., beer, liquor, cigarettes). The authors theorized and found that these pictures are motivationally relevant and therefore elicit automatic activation in the appetitive/approach or aversive/defensive motivational systems, which leads to increased attention, arousal, emotional response, and memory for the risky products. The authors also found that these responses are mediated by individual differences in motivational reactivity. The authors suggest that placing images of these products in prevention messages may work against the prevention goal by increasing appetitive activation and positive emotion in populations more inclined to take risks.