Active engagement in a web-based tutorial to prevent obesity grounded in Fuzzy-Trace Theory predicts higher knowledge and gist comprehension

We used Sharable Knowledge Objects (SKOs) to create an Intelligent Tutoring System (ITS) grounded in Fuzzy-Trace Theory to teach women about obesity prevention: GistFit, getting the gist of healthy eating and exercise. The theory predicts that reliance on gist mental representations (as opposed to verbatim) is more effective in reducing health risks and improving decision making. Technical information was translated into decision-relevant gist representations and gist principles (i.e., healthy values). The SKO was hypothesized to facilitate extracting these gist representations and principles by engaging women in dialogue, “understanding” their responses, and replying appropriately to prompt additional engagement. Participants were randomly assigned to either the obesity prevention tutorial (GistFit) or a control tutorial containing different content using the same technology. Participants were administered assessments of knowledge about nutrition and exercise, gist comprehension, gist principles, behavioral intentions and self-reported behavior. An analysis of engagement in tutorial dialogues and responses to multiple-choice questions to check understanding throughout the tutorial revealed significant correlations between these conversations and scores on subsequent knowledge tests and gist comprehension. Knowledge and comprehension measures correlated with healthier behavior and greater intentions to perform healthy behavior. Differences between GistFit and control tutorials were greater for participants who engaged more fully. Thus, results are consistent with the hypothesis that active engagement with a new gist-based ITS, rather than a passive memorization of verbatim details, was associated with an array of known psychosocial mediators of preventive health decisions, such as knowledge acquisition, and gist comprehension.     

Executive cognitive functioning and aggression: Is it an issue of impulsivity?

A large body of research has documented a relation between the executive cognitive functions (ECFs) and interpersonal aggressive behavior. A predominant theory proposes that individuals with poor ECFs are more aggressive because they are unable to inhibit impulsive behaviors. However, evidence for this relationship is typically indirect. In this study, 46 healthy men and women completed measures of ECF, the Taylor Aggression Paradigm, and the Go/No‐Go discrimination task, a behavioral measure of impulsivity. Also, impulsiveness of participant responses during the aggression task was directly assessed by measuring latency of responses to provocation (“set‐time”). It was hypothesized that low‐quartile–scoring ECF men and women would perform more aggressively and more impulsively than high‐quartile peers. Consistent with expectations, results indicated that ECF was related to aggression and to impulsivity on the Go/No‐Go task. However, low‐ECF men and women did not have shorter set‐times; in fact, on this task, low‐ECF participants' behavioral decisions seemed slightly slower than those of high‐ECF participants. In light of these results, the authors speculate that a social information‐processing problem may mediate the ECF aggression relationship rather than altered impulsivity per se. Aggr. Behav. 29:15–30, 2003. © 2003 Wiley‐Liss, Inc.     

Domain specificity of spatial expertise: the case of video game players

Two experiments examined whether video game expertise transfers to performance on measures of spatial ability. In Experiment 1, skilled Tetris players outperformed non‐Tetris players on mental rotation of shapes that were either identical to or very similar to Tetris shapes, but not on other tests of spatial ability. The pattern of performance on those mental rotation tasks revealed that skilled Tetris Players used the same mental rotation procedures as non‐Tetris players, but when Tetris shapes were used, they executed them more quickly. In Experiment 2, non‐Tetris players who received 12 hours of Tetris‐playing experience did not differ from matched control students in pretest‐to‐posttest gains on tests of spatial ability. However, Tetris‐experienced participants were more likely to use an alternative type of mental rotation for Tetris shapes than were Tetris‐inexperienced participants. The results suggest that spatial expertise is highly domain‐specific and does not transfer broadly to other domains. Copyright © 2002 John Wiley & Sons, Ltd.     

Virtue and Practical Deliberation

The question of how to reason well is an important normative question,one which ultimately motivates some of our interest in the more abstracttopic of the principles of practical reason. It is this normative questionthat I propose to address by arguing that given the goal of an importantkind of deliberation, we will deliberate better if we develop certainvirtues. I give an account of the virtue of stability and I argue thatstability makes reasoners (of a certain sort) reason better. Further,I suggest at the end of the paper that an account of virtues thatconduce to good reasoning might go a long way toward answering someof the traditional questions about the principles ofpractical reason.     

Using Mnemonics to Increase Early Literacy Skills in Urban Kindergarten Students

The purpose of this study was to examine the effects of an integrated mnemonics strategy on consonant letter naming and consonant sound production on three kindergarten students at-risk for academic failure. Flashcards were developed where the target capital letter was enhanced and imbedded as part of the known picture (e.g., the letter D as the doorknob on a door, the letter F as the flag and flagpole). The mnemonic strategy was assessed using a multiple baseline across students design. Results showed that all three students increased in both the number of consonants named and the number of consonant sounds produced. In addition, all three students maintained performance at the 1 and 3 week followup. Also, based on a pre- and post-assessment, 2 students demonstrated generalization to the ability to name words beginning with consonants letter-sound learned.     

The development of cued versus contextual conditioning in a predictable and an unpredictable human fear conditioning preparation

In this human fear conditioning study, the online development of conditioned US-expectancy to discrete cues and background contexts was measured in two groups. In the paired group (n=30), the CS was systematically followed by an aversive shock (US). In the unpaired group (n=30), CS and US were presented explicitly unpaired. Using US-expectancy ratings, we replicated the basic finding already illustrated in humans with startle modulation. In the paired group, the CS elicited more US-expectancy than the context, whereas in the unpaired group, the context elicited more US-expectancy than the CS. Interestingly, we also observed a trial-by-trial development of conditioning to the context in the unpaired group as indicated by a significant linear trend. This gradual development and the evidence for the role of US-expectancy in contextual fear add to the idea that cued and contextual fear rely on the same basic associative processes.     

The horizontal and vertical relations in upright faces are transmitted by different spatial frequency ranges

Faces convey distinct types of information: features and their spatial relations, which are differentially vulnerable to inversion. While inversion largely disrupts the processing of vertical spatial relations (e.g. eyes’ height), its effect is moderate for horizontal relations (e.g. interocular distance) and local feature properties. The SF ranges optimally transmitting horizontal and vertical face relations were here investigated to further address their functional role in face perception. Participants matched upright and inverted pairs of faces that differed at the level of local featural properties, horizontal relations in vertical relations. Irrespective of SF, the inversion effect was larger for vertical than horizontal and featural cues. Most interestingly, SF differentially influenced the processing of vertical, horizontal and featural cues in upright faces. Vertical relations were optimally processed in intermediate SF, which are known to carry useful information for face individuation. In contrast, horizontal relations were best conveyed by high SF, which are involved in the processing of local face properties. These findings not only confirm that horizontal and vertical relations play distinct functional roles in face perception, but they also further suggest a unique role of vertical relations in face individuation.     

Attention to global gist processing eliminates age effects in false memories

Counterintuitive age increases have been reported for the Deese-Roediger-McDermott (DRM) false memory illusion. The current theoretical explanation of this effect assumes that it is due to age increases in spontaneous interconnection of DRM list words' meanings. To test this explanation, 11-year-olds and young adults studied DRM lists under conditions that (a) encouraged them to form such meaning-based connections or (b) discouraged them from doing so. In line with the explanation, the usual developmental increase in false memory disappeared in the first condition but was preserved in the second condition. Also in line with the explanation, conjoint recognition analyses revealed that encouraging participants to form meaning connections increased their reliance on gist-based similarity judgments.     

The influence of social groups on goal contagion

Goal contagion is the automatic adoption of a goal upon perceiving another’s goal-directed behavior (Aarts, H., Gollwitzer, P. M., & Hassin, R. R. (2004). Goal contagion: Perceiving is for pursuing. Journal of Personality and Social Psychology, 87(1), 23-37). This paper tests the hypothesis that goal contagion is more likely between people who belong to the same groups. Because past work on goal contagion has required participants to read about the behavior of others, we also test whether goals are caught when one sees rather than reads about another’s motivated behavior. Across three studies, this ecologically valid methodology reliably produced goal contagion, and this effect was more likely to emerge when participants shared a group membership with those they observed. In Study 1, participants were more likely to take on the goal of individuals who belonged to their same university. Study 2 demonstrated that this effect occurred even when participants were not explicitly focused on the group membership of others. A final study verified that our effects were motivational by demonstrating that failing at a goal relevant task increased negative affect, but only for those who viewed the motivated behavior of someone from their own group.