Rationality of belief or: why savage’s axioms are neither necessary nor sufficient for rationality

Economic theory reduces the concept of rationality to internal consistency. As far as beliefs are concerned, rationality is equated with having a prior belief over a ??Grand State Space??, describing all possible sources of uncertainties. We argue that this notion is too weak in some senses and too strong in others. It is too weak because it does not distinguish between rational and irrational beliefs. Relatedly, the Bayesian approach, when applied to the Grand State Space, is inherently incapable of describing the formation of prior beliefs. On the other hand, this notion of rationality is too strong because there are many situations in which there is not sufficient information for an individual to generate a Bayesian prior. It follows that the Bayesian approach is neither sufficient not necessary for the rationality of beliefs.     

Work centrality and post-award work behavior of lottery winners

Individuals who had won the lottery responded to a survey concerning whether they had continued to work after winning. They were also asked to indicate how important work was in their life using items and scales commonly used to measure work centrality. The authors predicted that whether lottery winners would continue to work would be related to their level of work centrality as well as to the amount of their winnings. Individuals who won large amounts in the lottery would be less likely to quit work if they had relatively greater degrees of work centrality. After controlling for a number of variables (i.e., age, gender, education, occupation, and job satisfaction), results indicated that work centrality and the amount won were significantly related to whether individuals continued to work and, as predicted, the interaction between the two was also significantly related to work continuance.     

When questions change behavior: the role of ease of representation

In three experiments, we examined the mere-measurement effect, wherein simply asking people about their intent to engage in a certain behavior increases the probability of their subsequently engaging in that behavior. The experiments demonstrate that manipulations that should affect the ease of mentally representing or simulating the behavior in question influence the extent of the mere-measurement phenomenon. Participants who were asked about their intention to engage in various behaviors were more likely to engage in those behaviors than participants not asked about their intentions in situations in which mentally simulating the behavior in the intention question was relatively easy. We tested this ease-of-representation hypothesis using both socially desirable and socially undesirable behaviors, and our dependent variables comprised both self-reports and actual behaviors. Our findings have implications for survey research in various social contexts, including assessments of risky behaviors by public health organizations.     

The effect of age-at-testing on verbal memory among children following severe traumatic brain injury

Memory deficits are a common sequelae following childhood traumatic brain injury (TBI), which often have serious implications on age-related academic skills. The current study examined verbal memory performance using the Rey Auditory Verbal Learning Test (RAVLT) in a pediatric TBI sample. Verbal memory abilities as well as the effect of age at-testing on performance were examined. A sample of 67 children following severe TBI (age average = 12.3 ± 2.74) and 67 matched controls were evaluated using the RAVLT. Age effect at assessment was examined using two age groups: above and below 12 years of age during evaluation. Differences between groups were examined via the 9 RAVLT learning trials and the 7 composite scores conducted out of them. Children following TBI recalled significantly less words than controls on all RAVLT trials and had significantly lower scores on all composite scores. However, all of these scores fell within the low average range. Further analysis revealed significantly lower than average performance among the older children (above 12 years), while scores of the younger children following TBI fell within average limits. To conclude, verbal memory deficits among children following severe TBI demonstrate an age-at-testing effect with more prominent problems occurring above 12 years at the time of evaluation. Yet, age-appropriate performance among children below 12 years of age may not accurately describe memory abilities at younger ages following TBI. It is therefore recommended that clinicians address child’s age at testing and avoid using a single test as an indicator of verbal memory functioning post TBI.     

Child/Adolescent Abuse and Suicidal Behavior: Are They Sex Related?

The association between childhood and adolescent abuse and suicidal behavior, and the possible contribution of abuse to sex differences in non lethal suicidal behavior, was investigated. Data were extracted from the Israel‐based component of the WHO World Mental Health Survey (Kessler & Utsun, 2008a). Increased risk for ideation, plan, and suicidal attempt were associated with childhood abuse, and increased risk for attempt was associated also with abuse at adolescence. No associations with sex or sex by abuse interactions were observed. The higher frequency of childhood abuse among women could account in part for their higher rates of suicidal attempts as compared to men.     

Variables Affecting Non-financial Employment Commitment

Pour étudier la motivation non financière au travail, on a utilisé la question dite de la loterie: "Continueriez-vous à travailler si vous n'aviez plus besoin de gagner de l'argent?" 89.9% d'un échantillon représentatif d'actifs masculins israéliens ont affirmé qu'ils continueraient à travailler. Des résultats analogues avaient été obtenus en Israël il y a 10 ans. Mais la comparaison des enquetês fait apparaître des différences entre les réponses des plus jeunes et des plus âgés. On a fait appel à l'analyse discriminante pour classer les caractéristiques des travailleurs de l'échantillon qui choisissaient soit de continuer, soit d'arrêter de travailler. A partir d'une liste de variables liées au travail, quatre discriminants significatifs sont apparus: l'origine ethnique, la satisfaction professionnelle, la localisation de la résidence et le niveau culturel.
To evaluate non-financial commitment to work, the so-called "lottery question" was employed—i.e. "Would you continue working if there were no financial reason to carry on?" In a representative sample of men in the Israeli labour force, 89.9% indicated that they would continue working. Similar findings were reported in Israel a decade ago. However, a comparison of the surveys reveals variations between the responses of younger and older respondents. A stepwise discriminant analysis was utilised to classify the characteristics of workers in the present sample who expressed their preference either to continue or stop working. From a list of work-related variables, four significant discriminators emerged: ethnic origin, occupational satisfaction, place of residence, and educational level.     

The Effect of Cancer on Suicide among Elderly Holocaust Survivors

Jewish‐Israelis of European origin with cancer have higher suicide rates relative to their counterparts in the general population. We investigated whether this effect results from the high proportion of Holocaust survivors among them, due to vulnerabilities arising from the earlier traumas they sustained. The study was based on all Jewish‐European persons with cancer, 60 years and over, diagnosed in Israel between 1999 and 2007. The standardized incidence ratios were not significantly different between the exposed and nonexposed groups (men: 0.90, 95% CI 0.60–1.19; women: 0.95, 95% CI 0.55–1.37). Past exposure to maximum adversity did not increase the suicide risk among persons with cancer.