Homophone effects in visual word recognition depend on homophone type and task demands.

This experiment examined how the characteristics of homophones and their mates influence homophone effects, as a function of task demands. Two types of homophones were presented: 1) low-frequency homophones with higher-frequency mates that are not animal names (e.g., maid--made), and 2) low-frequency homophones with mates that are, on average, of equivalent frequency and are animal names (e.g., foul--fowl). We observed a double dissociation: In the lexical decision task (LDT), there was a homophone effect for the first type of homophones but not for the second, whereas in the semantic categorization task (SCT) the opposite was true. These results suggest that in these tasks the effects of homophony arise when the homophone's mate creates competition in terms of the type of processing emphasized in the task, namely, orthographic processing in the LDT and semantic processing in the SCT.     

Anti-fat prejudice among children: The “mere proximity” effect in 5-10 year olds

Research has shown that average-weight individuals are derogated when viewed next to overweight background individuals, rather than next to average-weight background individuals (Hebl, M. R., & Mannix L. M. (2003). The weight of obesity in evaluating others: A mere proximity effect. Personalilty and Social Psychology Bulletin, 29, 28-38). The aim of the present investigation was to determine whether this mere proximity effect would be obtained among children, and to determine how participant gender, target character gender and size, and background character size affect this finding. Eighty-nine children between 5 and 10 years old indicated whether they would like to be friends with a target character, who was either male or female and average-weight or overweight. The target was presented with four other background characters of the same gender, all of whom were either average-weight or overweight. The results showed that overall, overweight targets were liked significantly less than average-weight targets, though this effect was moderated by target gender. Furthermore, participants liked average-weight female targets significantly less when they were presented with overweight background characters, and liked overweight female targets significantly less when they were presented with average-weight background characters. This was not the case for male targets. These findings support the mere proximity effect for female targets and demonstrate that this effect is present in children as young as five years of age. The implications are discussed with regards to obesity stigma.     

Social transmission of Pavlovian fear: fear-conditioning by-proxy in related female rats

Pairing a previously neutral conditioned stimulus (CS; e.g., a tone) to an aversive unconditioned stimulus (US; e.g., a foot-shock) leads to associative learning such that the tone alone will elicit a conditioned response (e.g., freezing). Individuals can also acquire fear from a social context, such as through observing the fear expression of a conspecific. In the current study, we examined the influence of kinship/familiarity on social transmission of fear in female rats. Rats were housed in triads with either sisters or non-related females. One rat from each cage was fear conditioned to a tone CS+ shock US. On day two, the conditioned rat was returned to the chamber accompanied by one of her cage mates. Both rats were allowed to behave freely, while the tone was played in the absence of the foot-shock. The previously untrained rat is referred to as the fear-conditioned by-proxy (FCbP) animal, as she would freeze based on observations of her cage-mate’s response rather than due to direct personal experience with the foot-shock. The third rat served as a cage-mate control. The third day, long-term memory tests to the CS were performed. Consistent with our previous application of this paradigm in male rats (Bruchey et al. in Behav Brain Res 214(1):80–84, 2010), our results revealed that social interactions between the fear conditioned and FCbP rats on day two contribute to freezing displayed by the FCbP rats on day three. In this experiment, prosocial behavior occurring at the termination of the cue on day two was significantly greater between sisters than their non-sister counterparts, and this behavior resulted in increased freezing on day three. Our results suggest that familiarity and/or kinship influences the social transmission of fear in female rats.