Parallels Between Action‐Object Mapping and Word‐Object Mapping in Young Children

Across a series of four experiments with 3‐ to 4‐year‐olds we demonstrate how cognitive mechanisms supporting noun learning extend to the mapping of actions to objects. In Experiment 1 (n = 61) the demonstration of a novel action led children to select a novel, rather than a familiar object. In Experiment 2 (n = 78) children exhibited long‐term retention of novel action‐object mappings and extended these actions to other category members. In Experiment 3 (n = 60) we showed that children formed an accurate sensorimotor record of the novel action. In Experiment 4 (n = 54) we demonstrate limits on the types of actions mapped to novel objects. Overall these data suggest that certain aspects of noun mapping share common processing with action mapping and support a domain‐general account of word learning.     

Matching theory and induction explain operant performance

Matching theory is a general framework for understanding allocation of behavior among activities. It applies to choice in concurrent schedules and was extended to single schedules by assuming that other unrecorded behavior competes with operant behavior. Baum and Davison (2014) found that the competing activities apparently are induced by the “reinforcers” (phylogenetically important events, e.g., food) according to power functions. Combined with power-function induction, matching theory provides new equations with greater explanatory power. Four pigeons were exposed to conditions in which 7 different schedules of food delivery were presented within each experimental session. We replicated earlier results with variable-interval schedules: (a) a negatively accelerated increase of peck rate as food rate increased in the low range of food rates; (b) an upturn in pecking at higher rates; and (c) a downturn in pecking at extremely high food rates. When the contingency between pecking and food was removed, the food continued to induce pecking, even after 20 sessions with no contingency. A ratio schedule inserted in place of 1 variable-interval schedule maintained peck rates comparable to peck rates maintained by short interval schedules. We explained the results by fitting equations that combined matching theory, competition, and induction.     

Life Satisfaction and Incumbent Voting: Examining the Mediating Effect of Trust in Government

Journal of Happiness Studies - An emerging body of evidence suggests a causal relationship between wellbeing and incumbent voting. However, the evidence is primarily founded upon established...     

Response strength in extreme multiple schedules

Four pigeons were trained in a series of two-component multiple schedules. Reinforcers were scheduled with random-interval schedules. The ratio of arranged reinforcer rates in the two components was varied over 4 log units, a much wider range than previously studied. When performance appeared stable, prefeeding tests were conducted to assess resistance to change. Contrary to the generalized matching law, logarithms of response ratios in the two components were not a linear function of log reinforcer ratios, implying a failure of parameter invariance. Over a 2 log unit range, the function appeared linear and indicated undermatching, but in conditions with more extreme reinforcer ratios, approximate matching was observed. A model suggested by McLean (1991), originally for local contrast, predicts these changes in sensitivity to reinforcer ratios somewhat better than models by Herrnstein (1970) and by Williams and Wixted (1986). Prefeeding tests of resistance to change were conducted at each reinforcer ratio, and relative resistance to change was also a nonlinear function of log reinforcer ratios, again contrary to conclusions from previous work. Instead, the function suggests that resistance to change in a component may be determined partly by the rate of reinforcement and partly by the ratio of reinforcers to responses.     

I Knew It All Along,Unless I Had to Work to Learn What I Know

After receiving knowledge regarding some topic, people usually overestimate their prior topic knowledge. Two experiments investigated whether people would claim less prior knowledge if they worked to earn their present knowledge. In Study 1, students finishing a psychology course claimed less precourse psychology knowledge if they reported devoting more effort toward the course. In Study 2, the knew-it-all-along effect was stronger for participants who were simply given the answers to questions than for participants who studied for 20 minutes to learn the answers. Both cognitive and motivational factors can account for the observed effects of effort investment on retrospective knowledge judgments.     

Childhood attachment to parents and frequency of prayer during the college years

This study examines the association between childhood attachment with parents and the frequency of prayer among people raised in Mormon families. Three types of attachment with fathers and mothers – secure, anxious, and avoidant – were measured on a Likert scale. Undergraduate students at a state university in Utah completed questionnaires that included measurements of childhood attachment with parents and frequency of prayer. According to bivariate correlations, frequency of prayer was related to the nature of childhood attachment to parents; according to multiple regression analyses, the correlation between frequency of prayer and childhood attachment was largely, but not entirely, accounted for by other factors involving general frequency of religious activity; finally, these results differed somewhat between men and women. Men who had an avoidant relationship with their mother in childhood prayed less often when they were in college, while for women this association was not statistically significant.     

Characteristics of congregations that might increase their participants’ risk of depression

This research examines some characteristics of congregations that might increase the risk of their participants being depressed. Analysing data from the Portraits of American Life Study Wave 1 (2006), this research found that those affiliated with a congregation that did not meet their spiritual needs had arguments about traditional versus contemporary beliefs, made them feel like outsiders, and had unsatisfactory decision-making processes which were more likely to feel depressed than their counterparts. The findings of this research suggest that to alleviate the problem of depression, individuals need to choose a congregation that meets their spiritual needs and makes them feel accepted, rather than just attending any congregations.