A test of the X-linked genetic hypothesis for sex differences on Piaget's water-level task

Data from seven studies involving 849 high school and college students were used to test the recessive X-linked genetic model prediction that the square of the proportion of men who perform accurately on the water-level task is equal to the proportion of women who perform accurately. Goodness-of-fit tests showed that this prediction was confirmed for each sample. A model with a single estimate of gene frequency accounted for all the data when a classification error parameter was incorporated into the X-linked model. In both models the gene frequency parameter was about $\text{2}\text{3}$.     

Deadly Force and Deadly Outcome: Examining the Officer,Suspect, and Situational Characteristics of Officer-Involved Shootings

ABSTRACT

Police use-of-force in general, and police use of deadly force in particular, has been at the forefront of national media attention in recent years. Despite this visibility, scholarly attention to the complexities and nuances of the dynamics at play that lead to fatal and non-fatal outcomes for suspects involved in these encounters has been limited. As such, the current study draws from data collected from 2015 to 2018 in the state of Texas to examine the officer-, suspect-, and situational-level correlates and predictors of suspect death resulting from being involved in an officer-involved shooting. Bivariate results suggest that officer race, suspect race, the suspect being armed with a deadly weapon, and the officer responding to a suspicious activity call are significantly associated with suspect death versus being injured in an officer-involved shooting. More rigorous multivariate results reveal that the situational context (i.e., the suspect being armed with a deadly weapon and the incident resulting from a suspicious activity call) is particularly relevant for predicting the lethality of an officer-involved shooting for the suspect. Study limitations and directions for future research are also discussed.     

Attenuation of latent inhibition by post-acquisition reminder

Using lick suppression by water-deprived rats as an associative index, white noise-footshock pairings resulted in less manifest conditioning when repeated non-reinforced presentations of the white noise preceded conditioning than when no stimulus pre-exposure was given, i.e., latent inhibition was observed. However, the latent inhibition deficit was reduced in animals who received as a reminder treatment shock-alone presentations in another context during the retention interval. Animals conditioned without prior stimulus pre-exposure and those exposed to the white noise and shock unpaired during the conditioning phase of the study showed no change in lick suppression as a result of the reminder treatment. These results suggest that the behavioural deficit produced by non-reinforced pre-exposure to the to-be-conditioned stimulus arises at least in part from a reversible retrieval failure rather than a lack of acquisition.