Shawn M. Smith’s research while affiliated with University of Wisconsin–Whitewater and other places

Many laboratory studies of aggression use a measure known as the modified Taylor Competitive Reaction Time Test (TCRTT), for which validation studies are lacking. Using sound blasts administered by the participant against a fictional human opponent, the TCRTT also allows for multiple methods of measuring aggression. The validity of the TCRTT was tested in 53 college student participants. Participants took a self-report measure of aggressiveness as well as neuropsychological measures of frontal lobe functioning predictive of aggression. Results were not supportive of the TCRTT's validity and indicated concerns regarding the use of the TCRTT as a measure of aggression. Results suggest that labaratory studies of media violence using the TCRTT are of questionable validity.

Two studies examined the relationship between exposure to violent video games and aggression or violence in the laboratory and in real life. Study 1 participants were either randomized or allowed to choose to play a violent or nonviolent game. Although males were more aggressive than females, neither randomized exposure to violent-video-game conditions nor previous real-life exposure to violent video games caused any differences in aggression. Study 2 examined correlations between trait aggression, violent criminal acts, and exposure to both violent games and family violence. Results indicated that trait aggression, family violence, and male gender were predictive of violent crime, but exposure to violent games was not. Structural equation modeling suggested that family violence and innate aggression as predictors of violent crime were a better fit to the data than was exposure to video game violence. These results question the common belief that violent-video-game exposure causes violent acts.

Previous research has indicated that potential jurors are likely to use personal biases, such as those based on gender and ethnicity, in their judgments of culpability of criminal defendants in addition to, or instead of, the facts of the crime. The present paper seeks to extend this literature to the crime of filicide; to examine whether male defendants are judged more harshly than female defendants, as is the case for domestic violence and sexual abuse. 214 participants were provided with a scenario of filicide in which the gender of the perpetrator, the gender of the child, and the family's social class were randomly assigned. Participants were asked to rate the culpability of the defendant in the case. Results indicated that, unlike for other violent crimes, participants did not use gender or social class biases in their judgments of criminal culpability.

Despite its popularity among pet owners and professional trainers, we are not aware of any studies that have investigated the efficacy of clicker training in canines. To this end, we taught 35 basenjis to nose-touch an orange traffic cone. Upon meeting pre-determined criteria, dogs progressed through: (1) training trials, wherein correct responses were followed immediately with a click plus food (clicker group) or food alone (control group); (2) strengthening trials, wherein dogs received the same reinforcement protocol as in training trials, except nose-touching behaviour was variably reinforced; and (3) extinction trials, wherein food was withheld from both groups, but dogs in the clicker group received a click alone for nose-touches. We found that the clicker and control groups did not differ with regard to the number of trials or the time required to meet training or strengthening criteria (P > 0.05 for all). However, the clicker group required significantly more trials (log 10 transformed means AE S.E. = 1.6 AE 0.03 trials versus 1.4 AE 0.03 trials, P < 0.001) and more time (log 10 transformed means AE S.E. = 2.85 AE 0.03 s versus 2.73 AE 0.03 s, P = 0.008) to reach extinction criterion. Additionally, younger dogs required fewer training (h 2 p ¼ 0:304, P = 0.001) and strengthening (h 2 p ¼ 0:140, P = 0.029) trials and less training (h 2 p ¼ 0:221, P = 0.005) and strengthening (h 2 p ¼ 0:180, P = 0.013) time to meet criteria than did older dogs. However, no age effect was found on extinction for either the number or duration of trials (P > 0.05 for both), implying that persistence in previously reinforced behaviour did not influence the age sensitivity found in task acquisition. Overall, these results suggest that, whereas the clicker may prolong behaviour without primary reinforcement, it does not reduce the training time of a simple operant task in dogs when primary reinforcement is briefly delayed. We speculate that the clicker may be most useful in maintaining established behaviours when primary reinforcement is unavailable or when its delivery is impractical.