‘So Help Me God’? Does oath swearing in courtroom scenarios impact trial outcomes?

In countries such as Britain and the US, court witnesses must declare they will provide truthful evidence and are often compelled to publicly choose between religious (“oath”) and secular (“affirmation”) versions of this declaration. Might defendants who opt to swear an oath enjoy more favourable outcomes than those who choose to affirm? Two preliminary, pre-registered survey studies using minimal vignettes (Study 1, N = 443; Study 2, N = 913) indicated that people associate choice of the oath with credible testimony; and that participants, especially religious participants, discriminate against defendants who affirm. In a third, Registered Report study (Study 3, N = 1821), we used a more elaborate audiovisual mock trial paradigm to better estimate the real-world influence of declaration choice. Participants were asked to render a verdict for a defendant who either swore or affirmed, and were themselves required to swear or affirm that they would try the defendant in good faith. Overall, the defendant was not considered guiltier when affirming rather than swearing, nor did mock-juror belief in God moderate this effect. However, jurors who themselves swore an oath did discriminate against the affirming defendant. Exploratory analyses suggest this effect may be driven by authoritarianism, perhaps because high-authoritarian jurors consider the oath the traditional (and therefore correct) declaration to choose. We discuss the real-world implications of these findings and conclude the religious oath is an antiquated legal ritual that needs reform.     

Addendum to "Summation in the chimpanzee (Pan troglodytes)"

Rumbaugh, Savage-Rumbaugh, and Hegel (1987) reported that two chimpanzees (Pan troglodytes) could select, with better than 90% accuracy, the greater of two paired quantities of chocolate chips. In that study, no one quantity of chocolates (from 0 through 5) was used in both pairs on a given trial. We investigated the effect of having one quantity in common (CQ) in both pairs. Whether the other quantities (OQs) of chocolates were both less than or greater than the CQ, summation still occurred. Accuracy was primarily a function of the ratios of sums to be differentiated. This finding substantiated the earlier conclusion that summation was based on both quantities of each pair and not on some simpler process such as the avoidance of the tray with the smallest single amount or selection of the tray with the single largest amount.     

Note on hand use in the manipulation of joysticks by rhesus monkeys (Macaca mulatta) and chimpanzees (Pan troglodytes)

In a recent article MacNeilage, Studdert-Kennedy, and Lindblom (1987) proposed that nonhuman primate handedness may be contingent on the specific task requirements with visual-spatial tasks yielding left-hand preferences and fine motor tasks producing right-hand preferences. This study reports hand preferences in the manipulation of joysticks by 2 rhesus monkeys (Macaca mulatta) and 3 chimpanzees (Pan troglodytes). Reach data were also collected on these same subjects and served as a basis for comparison with preference data for manipulation of the joystick. The data indicated that all 5 subjects demonstrated significant right-hand preferences in manipulating the joystick. In contrast, no significant hand preferences were found for the reach data. Reaction time data also indicated that the right hand could perform a perceptual-motor task better than the left hand in all 5 subjects. Overall, the data indicate that reach tasks may not be sensitive enough measures to produce reliable hand preferences, whereas tasks that assess fine motor control produce significant hand preferences.     

How students invest their time outside of school: Effects on school-related outcomes

The purpose of this study is to examine the degree towhich various kinds of out-of-school activitiesadolescents participate in influence their schoolengagement, achievement, and perceptions of their lifechances. The conceptual framework outlined by theauthors suggests personal investments students makeoutside of school in meaningful, structured activitiesand with the help and guidance of adults serving asrole models have significant effects on variouseducational outcomes. To that end, the authors foundsome evidence suggesting that student participation instructured activities and religious activities andtime spent interacting with adults during tenth gradeappear to have positive and significant effects onvarious educational outcomes by Grade 12. Conversely,time spent hanging out with peers was consistentlynegatively associated with educational outcomes in thestudy, with few exceptions. The effects of time spentworking for pay and time spent alone were somewhatinconsistent throughout the analysis but this may bedue to methodological problems within the measures. The result of the analysis has implications forafter-school and summer school policies and programs. The authors discuss these implications and suggestfurther study of the effects of school context, familyinfluence, and the availability of community resourceson students' personal investments.     

The NASA/LRC computerized test system

A new testing package, including apparatus and tasks, is described for the study of behavior of a variety of species in a variety of experiments. The package is described with respect to the kinds of comparative psychological investigations for which it is well suited. The preliminary data generated within this new testing paradigm demonstrate that the NASA/LRC Computerized Test System provides a flexible yet powerful environment for the investigation of behavioral and psychological processes.     

Two discrimination test apparatuses for primates

This paper describes two test apparatuses developed to facilitate discrimination learning studies with primates. The semiautomated apparatus provides for presentation of stereometric stimulus materials through the illumination of lamps which make a one-way mirror transparent at the onset of a trial. The totally automated test system was developed to facilitate the collection of Transfer Index (TI) measurements, measurements intended to provide for equitable assessments of the learning-set capabilities of diverse primate genera. The TI test procedures and the system’s operations provide for criterional mastery (67% or 84% responses correct) of two-ehoice visual discrimination problems, consisting of projected patterns, then reversal of cues for the 10 test trials that are of particular significance in calculation of the TI scores.     

Subjective correlates and consequences of belief in free will

Four studies measured or manipulated beliefs in free will to illuminate how such beliefs are linked to other aspects of personality. Study 1 showed that stronger belief in free will was correlated with more gratitude, greater life satisfaction, lower levels of perceived life stress, a greater sense of self-efficacy, greater perceived meaning in life, higher commitment in relationships, and more willingness to forgive relationship partners. Study 2 showed that the belief in free will was a stronger predictor of life satisfaction, meaning in life, gratitude, and self-efficacy than either locus of control or implicit person theory. Study 3 showed that experimentally manipulating disbelief in free will caused a reduction in the perceived meaningfulness of life. Study 4 found that inducing a stronger belief in free will caused people to set more meaningful goals for themselves. The possible concern that believers in free will simply claim all manner of positive traits was contradicted by predicted null findings with regard to sense of humor, empathy, and self-rated attractiveness. Taken together, the present studies show that the belief in free will is a strong predictor of several positive traits and outcomes.     

Identität, Familie, Patienten, Olympier

The author deals with the tradition of mental patterns in psychoanalytic institutes shaping the character of training. He discusses several patterns which in his opinion have become dysfunctional and are already in change: the family model, the patient model, the conception of training analysts as Olympians, the psychoanalytic identity as the endpoint of training and the model of the closed society. He argues for further transformation of these institutionalized patterns in order to avoid stagnation and remain future oriented. For each pattern he proposes concrete measures, which can be helpful for change.