The Role of Familial Incarceration and Ethnic Identity in Suicidal Ideation and Suicide Attempt: Findings from a Longitudinal Study of Latinx Young Adults in California

Suicide is a leading cause of death among young adults; however, contextual risks and cultural factors are rarely studied in the context of ethnic minority suicidal ideation (SI) and suicidal attempt (SA). This study assessed the association between familial incarceration and suicide behaviors and examined ethnic identity as a potential moderator. Data from a longitudinal study of health among Hispanics (n = 1,094) in California were used to test associations between familial incarceration, ethnic identity, and SA and SI, adjusting for demographic factors and covariates. Approximately 18% and 8% of respondents reported SI and SA, respectively. Compared to no incarceration, or the incarceration of a relative, parental incarceration was associated with higher odds (AOR: 2.09, 95% CI: 1.23–3.34) of SI whereas higher affective ethnic identity reduced the odds (AOR: 0.52, 95% CI: 0.31–0.89) of SA. Ethnic identity moderated the association between parental incarceration and SI (AOR: 0.33, 95% CI: 0.13–0.79). Incarceration of a family member can set the stage for exclusion from critical institutions and can have long‐term consequences for adult mental health. Promoting a positive ethnic identity may be a promising prevention strategy that could bolster resilience among at‐risk, urban minority youth.     

Non-bayesian foundations for statistical estimation, prediction, and the ravens example

The paper provides a formal proof that efficient estimates of parameters, which vary as as little as possible when measurements are repeated, may be expected to provide more accurate predictions. The definition of predictive accuracy is motivated by the work of Akaike (1973). Surprisingly, the same explanation provides a novel solution for a well known problem for standard theories of scientific confirmation — the Ravens Paradox. This is significant in light of the fact that standard Bayesian analyses of the paradox fail to account for the predictive utility of universal laws like All ravens are black.I wish to thank Martin Barrett, Ellery Eells, Berent Enç, Branden Fitelson, Dan Hausman, Eric Saidel, Brian Skyrms, Elliott Sober, Mariam Thalos, as well as anonymous reviewer, for helpful suggestions. This research was supported by NSF grant DIR-8822278, and by the Graduate School at the University of Wisconsin, Madison.     

Use of carbon monoxide breath validation in assessing exposure to cigarette smoke in a worksite population

Assessed the usefulness of carbon monoxide (CO) breath validation of self-reported smoking status in a large worksite population (N = 4,647). CO assessment was performed as part of a baseline survey procedure. CO levels differed substantially in relation to self-reported smoking status and amount smoked. Correcting for ambient exposure (estimated by mean CO levels among never smokers) produced more satisfactory results than uncorrected CO levels. Striking company differences were observed in mean CO exposures among self-reported never smokers. An unexpected finding was that 17.1% of current smokers reported smoking less than daily. Although the CO measure was excellent in detecting moderate and heavy smokers, it was inadequate in detecting occasional and light smokers. If detection of occasional or lighter smoking is critical to the purposes of the study, the more expensive (but more accurate) cotinine measure is preferred.     

Terminating and exhaustive search in lexical access

Two experiments which test predictions derived from the assumption that lexical access involves a search process are reported. In the first experiment, test items must be classified as ambiguous or unambiguous, and in the second experiment, they are classified according to their syntactic properties. In both experiments, it is shown that when the target of the search is a nonexistent entry, an exhaustive search is involved, even though the test items are words. Further, in these conditions, frequency of occurrence is no longer related to decision time, as it is in lexical decision experiments. It is concluded that the search model adequately explains the procedure whereby the most common meaning of a homograph is accessed, but that the less common meaning is accessed in some completely different manner.     

Comparison of auras and triggering factors in epilepsy

Case reports of five patients are presented, each with a specific aura at the onset of the seizures. All of these patients’ had seizures during the waking state. Their auras were carefully replicated and presented to the patients under various conditions. The presentation of the auras evoked neither clinical nor EEG evidence of seizures. A sixth patient had seizures only when asleep which were preceded by vivid nightmares. Since the seizures occurred only when the patient was asleep, we considered that the seizures could be reflex in nature and evoked by a dream. Replication of the dream, however, did not evoke clinical or EEG evidence of epilepsy. The dreams, therefore, were auras or a part of the seizure complex.     

Absence of lexical and orthographic effects in a same-different task

Two experiments are reported that investigate whether the lexical and orthographic effects typically found in a simultaneous matching task are due to the facilitating effect of linguistic context on letter identification. The first experiment used a delayed matching task (2-sec SOA), with serial incremental display of the letters of the second stimulus (e.g., B, BR, BRA, BRAI, BRAIN). Lexical and orthographic effects were clearly demonstrated when the letters of the second stimulus were displayed rapidly (40 msec/letter), but these effects were absent at a slower speed (400 msec/letter). The same results were obtained in a second experiment, in which the letters of both stimuli were synchronously presented at either the fast rate or the slow rate. These results were interpreted in terms of a multilevel race model that assumes no interaction between levels of processing and attributes the effects to differing degrees of decision-processing lag.     

Pragmatic and behavioral aspects of computerized tomographic scanning in epileptic patients

The computerized tomographic scan (CT) is a valuable method for screening the epileptic population. From the pragmatic standpoint, it is safe and nonpainful, and the cost is offset by its usefulness in uncovering and treating unexpected lesions such as brain tumors. In patients with brain tumors, CT scans are valuable for posttherapy follow-up and for determining the time for appropriate therapy in patients with minimal or no neurological deficits. The CT scan is far superior to routine skull x-ray and nuclear scan studies. Electroencephalography, the prime laboratory method for investigating epilepsy, is not as useful as the CT scan for demonstrating structural changes. In posttraumatic, postcerebrovascular accident and postinfectious patients, demonstration of the lesion is helpful from a behavioral standpoint, for understanding the patient’s psychological, emotional and cognitive difficulties. The psychological management of brain tumor patients is greatly aided by repeated CT scan studies.     

Concurrent task interference in stutterers: dissociating hemispheric specialization and activation

Using all four combinations of hand and foot, adult stutterers and nonstutterers performed a unimanual sequential finger tapping task together with a stimulus-contingent foot responding task. The two groups were similar in that both demonstrated more dual-task interference when using the ipsilateral than contralateral limb pairs. Contrary to a prediction based on a hypothesis that attributes stuttering to neural interference due to an ungated or unregulated activity flow between the hemispheres, stutterers did not show more interference than nonstutterers when using the contralateral limb pairs. The groups did differ, however, in terms of finger tapping interference associated with right- versus left-foot concurrent task responding. Nonstutterers showed more interference when using the left than right foot. This was interpreted in terms of the attentional demands that the foot responding task placed on a system with an inherent left-hemisphere attentional bias. The lack of a reliable difference in stutterers with respect to interference by the two feet is consistent with indications from other research that stutterers have a relatively labile system of hemispheric attention or activation. The results of the study are placed into the context of a general model of the brain mechanisms associated with stuttering.