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This study investigated the impact of food claims, food cues, and objective health characteristics on health categorization speed and accuracy, believability of claims and perceptions of health, and taste for food items. One hundred twenty-four young adults were exposed to counterbalanced food item images, which varied by directness of visual food cues, type of food claims (health-related vs. taste-related), and objective healthfulness in a fully crossed design across three different food items. Participants categorized the foods as healthy or unhealthy in a speeded task and evaluated the perception of claim believability and perceptions of health and taste after exposure to images of the food items. Direct visual cues, especially when used with health claims, improved health and taste perception ratings and aided believability of health claims even for objectively unhealthy food products.

To examine the potential effectiveness of media literacy education in the context of well-established personality factors, a survey of 472 young adults, focused on the issue of alcohol marketing messages, examined how individual differences in personality associate with constructs representing aspects of media literacy. The results showed that need for cognition predicted social expectancies and wishful identification with media portrayals in alcohol advertising only through critical thinking about media sources and media content, which are foci of media literacy education. Need for affect did not associate with increased or diminished levels of critical thinking. Critical thinking about sources and messages affected skepticism, represented by expectancies through wishful identification, consistent with the message interpretation process model. The results support the view that critical thinking about media sources is an important precursor to critical thinking about media messages. The results also suggest that critical thinking about media (i.e., media literacy) reflects more than personality characteristics and can affect wishful identification with role models observed in media, which appears to be a key influence on decision making. This adds support to the view that media literacy education can improve decision making across personality types regarding alcohol use by decreasing the potential influence of alcohol marketing messages.