Infants' Expectations in Play: The Joy of Peek-a-boo

Abstract

The role of expectations in infants' enjoyment of play was studied by observing their smiling, laughter, and eyebrow raises during a peek-a-boo game that contained occasional trick trials. In Experiments 1 and 2, 6, 7-, and 8-month-olds (n = 29) participated in a peek-a-boo game in which, on occasional “person-switch” trials, one adult hid and a second adult “reappeared” in his or her place. Infants in all age groups smiled less following person-switch reappearances than following normal ones, with the difference increasing with age. In Experiment 3, 7-month-old infants (n = 10) played a peek-a-boo game in which the adult occasionally reappeared in a different location. Smiling decreased for “location switches” just as it had for person switches. Infants in all age groups were more likely to exhibit eyebrow raises following trick reappearances than following normal ones. These findings suggest that infants as young as 6 months have expectations about the identity and location of a returning person, that conformity to these expectations contributes to infants' enjoyment of games such as peek-a-boo, and that infants of this age may not yet enjoy deviations from their expectations. Implications are discussed for theories of playful enjoyment, for the cognitive antecedents of positive affect, and for cognitive development.     

Risk Comprehension and Judgments of Statistical Evidentiary Appeals

Too little theory and research has considered the effects of communicating statistics in various forms on comprehension, perceptions of evidence quality, or evaluations of message persuasiveness. In a considered extension of Subjective Message Construct Theory (Morley, 1987), we advance a rationale relating evidence form to the formation of impressions of evidence. We compare visual versus verbal representations of statistical evidence associated with multivariate relationships in a community‐based field experiment (N= 206). Verbal forms were found to be better comprehended than visual forms and contributed to enhanced understanding when compared to an attention control condition. Comprehension was found to mediate the effect of statistical evidence form on perceptions of evidence quality, while comprehension and perceptions of evidence quality moderated judgments of message persuasiveness. In addition to the effects of evidence form on subjective impressions of statistical evidence, we advance perceiver characteristics as another realm in which persuaders may identify persistent patterns associated with comprehension and judgments of statistical evidence. Numeracy skills, race, and gender emerge as characteristics with merit in this regard. Nonsignificant findings associated with perceiver characteristics were found. Finally, we consider the results for evidence form and perceiver characteristics on comprehension and judgments of statistical evidence for their theoretic and pragmatic importance.