Parental responses to infant crying: the influence of child physical abuse risk and hostile priming

OBJECTIVE: Managing a crying infant is a challenge universally faced by new parents. This study examined whether parental interpretations, feelings, and behaviors following exposure to a 2-minute videotaped segment of a crying infant varied as a function of child physical abuse (CPA) risk and exposure to cues of hostility (i.e., hostile priming). METHOD: Participants included 84 general population parents (52 low and 32 high CPA risk) with valid and complete protocols. It was predicted that (1) negative trait ratings, (2) feelings of hostility, and (3) ability to modulate grip strength would differ across CPA risk groups (high vs. low) and priming conditions (hostile vs. neutral). RESULTS: As expected, high, compared to low, CPA risk parents rated the crying infant more negatively and reported higher levels of hostile feelings after watching the crying infant video. Hostile priming independently increased feelings of hostility, such that high CPA risk parents who were primed with hostile words reported higher levels of hostile feelings relative to all other conditions. Hostile priming also was modestly associated with increased use of excessive force when parents attempted to produce a half-strength grip; however this difference was apparent only among high CPA risk parents. CONCLUSIONS: High, compared to low, CPA risk parents rated the crying infant more negatively and reported higher levels of hostile feelings after watching the crying infant video. Hostile priming independently increased hostile feelings and was modestly associated with use of excessive force in the hand grip task among high CPA risk parents.     

千禧一代,“自恋狂”还是“新人王”?

我即将要做的事正是多少年来老一辈的人都曾经做过的:批评比我年轻的人懒惰、自私、浅薄、自以为是。以下是一些冰冷的硬数据:美国国家卫生研究院提供的数据显示,与目前达到65岁或以上的人相比,二十多岁的年轻人患自恋型人格障碍的几率是前者的将近三倍。这些人深信自己很了不起:"全国青年与宗教调查"报告发现,60%的千禧一代表示,他们在任何情况下遵守的道德是:他们觉得这是对的就行。     

The Impact of a Science Education Game on Students’ Learning and Perception of Inhalants as Body Pollutants

This study investigated the knowledge gains and attitude shifts attributable to a unique online science education game, Uncommon Scents. The game was developed to teach middle school students about the biological consequences of exposure to toxic chemicals in an environmental science context, as well as the risks associated with abusing these chemicals as inhalants. Middle school students (n = 444) grades six through eight participated in the study consisting of a pre-test, three game-play sessions, and a delayed post-test. After playing the game, students demonstrated significant gains in science content knowledge, with game usability ratings emerging as the strongest predictor of post-test content knowledge scores. The intervention also resulted in a shift to more negative attitudes toward inhalants, with the most negative shift occurring among eighth grade students and post-test knowledge gains as the strongest predictor of attitude change across all grade levels. These findings suggest that the environmental science approach used in Uncommon Scents is an efficacious strategy for delivering both basic science content and influencing perceived harm relating to the inhalation of toxic chemicals from common household products.     

Delay discounting in rhesus monkeys: equivalent discounting of more and less preferred sucrose concentrations

Humans discount larger amounts of a delayed reinforcer less steeply than smaller amounts, but studies with pigeons and rats have yet to reveal such a magnitude effect, suggesting that the effect may be unique to humans. The present study examined whether the magnitude effect is observed in a species phylogenetically closer to humans, by comparing the rates at which rhesus monkeys discounted 10% and 20% concentrations of sucrose. There were no systematic differences in the rates at which the monkeys discounted the two sucrose concentrations, despite the fact that they strongly preferred the 20% concentration. Interestingly, the monkeys discounted delayed sucrose at a rate higher than was observed with delayed cocaine, and lower than was observed with delayed saccharin in previous studies (Freeman et al. Behavioural Processes, 82, 214-218, 2009; Woolverton et al. Experimental and Clinical Psychopharmacology, 15, 238-244, 2007). Taken together, these findings suggest that although both quantitative and qualitative differences can affect monkeys’ preferences between immediate reinforcers, qualitative differences between types of reinforcers (e.g., sucrose vs. cocaine) can affect monkeys’ discounting rates in a way that quantitative differences within a reinforcer (e.g., 10% vs. 20% sucrose) do not.     

Quantifying competitive swim training using accelerometer-based activity monitors

Recent advances in miniaturized waterproof accelerometers have allowed their use as a tool in examining swim stroke characteristics (Ohgi et al. JPSE Int J 45:960–966, 2002; Sports Eng 6:113–123, 2003). A better use for this technology, however, might be to quantify characteristics of competitive swim training. The purpose of this study was thus to examine commercial accelerometers’ ability to track and quantify swim training variables common to all swim training programs: speed and distance. Swimmers (n = 43) were fitted with two accelerometer monitors on their right wrist and ankle. From this output, regression analyses were performed as a means to describe swim distance and speed. Ten additional swimmers (experimental group, n = 10) were then utilized to cross validate these equations as being useful to predict swim distance and speed. The results demonstrated a positive, significant relationship between activity counts and actual swim distance (r = 0.90, p < 0.05), actual swim speed (r = 0.80; p < 0.05), and cross validation confirmed the accuracy of the prediction equations. The findings of the present study suggest that commercial accelerometer-based activity monitors have the ability to quantify important characteristics of competitive swim training.