Cognitive performance during successive sustained physical work episodes

The effects of physical work (30% of \(\dot VO_2 \) max), sleep loss (3-h nap during a 48-h operation), continuous work (CW), and time of day on cognitive performance were assessed (by ANOVA) in this repeated-measures study comparing two groups (exercise/nonexercise) of healthy young men (N=22). Treadmill walking did not accentuate or attenuate sleep loss effects on performance; however, sleep loss alone did degrade visual vigilance and memory for words. Time-of-day fluctuations were found in choice reaction time, logical reasoning, and word memory. Visual vigilance for nonexercising subjects degraded sooner on the 2nd CW day than it did for exercising subjects. A 3-h nap at 0400 h after 1 17-h CW day was not immediately recuperative. These findings indicate that exercise at 30% of \(\dot VO_2 \) max does not compound sleep-loss effects in cognitive performance. Indeed, physical activity during video terminal monitoring may delay any sleep-loss decrement. Variability of many cognitive abilities throughout the day appeared to show a greater effect than the sleep-loss and exercise effects over 2 days.     

Statistical power analysis for one-way analysis of variance: A computer program

To facilitate the computation of statistical power for analysis of variance, Cohen developed the index of effect sizef, defined as theSD between groups divided by theSD within groups. A microcomputer program for statistical power allows the user to compute the value off in any of several ways: by specifying the mean andSD for every cell in the ANOVA; by specifying the mean value for the two extreme cells and the pattern of dispersion for the remaining cells; by estimating the proportion of variance in the dependent variable that will be explained by group membership; and/or with reference to conventions for small, medium, and large effects. The program will compute power for any single set of parameters; it will also allow the user to generate tables and graphs showing how power will vary as a function of effect size, sample size, andα.     

Can humans think their way to increased freedom?

In response to Auger's article, “Are Human Beings Free?” several points are made in favor of humans' having at least some degree of free choice or free will: (1) Although partly dependent on biological and social influences for their tastes, people may sometimes actually train themselves to change these tastes and desires. (2) Although logically people may never be totally responsible for their acts, unless we pragmatically hold them responsible for their antisocial behavior we vitiate all moral rules of the social groups in which theychoose to reside. (3) RET can hold people responsible for their wrongdoing and help them to act less wrongfully in the future by teaching them how to condemn theirdeeds andacts but not themselves as humans.     

The Attractiveness of Panentheism—a Reply to Benedikt Paul Göcke

In his recent article in Sophia, Benedikt Paul Göcke concluded that ‘as long as we do not have a sound argument entailing the necessity of the world, panentheism is not an attractive alternative to classical theism’ (Benedikt Paul Göcke, ‘Panentheism and Classical Theism’, Sophia 52, no. 1 (2013): 75). As the article progresses, Göcke clarifies his view of what panentheism is, essentially identical to Göcke’s view of classical theism in every way, except in the world’s modal relation to God. This concept is vastly different to many of the panentheistic notions that are more commonly held. While it is not initially made transparent—especially with the label Göcke chooses to use—it becomes increasingly clear that Göcke critiques a God concept of his own making. More common variations of panentheism are contrasted with Göcke’s version, in order to provide a broader and more accurate view of the ancient concept, and to demonstrate that Göcke’s view of panentheism is idiosyncratic. It is finally explained that even if Göcke’s view of panentheism were definitive, he has not successfully argued for the relative unattractiveness of the concept, relative to his view of classical theism.     

Commentary on Wolford,Taylor, and Beck: The conjunction fallacy?

AlthoughP(A&B|X) can never exceedP(A|X) (the conjunction rule), it is possible forP(X|A&B) to exceedP(X|A). Hence, people who rankA&B as more probable thanA are not necessarily violating any normative rule if the ranking is done in terms of the probability of these events to yield an eventX. Wolford, Taylor, and Beck (1990) have argued that this indeed is what happens in some problems (e.g. Tversky& Kahneman’s [1983] Linda problem). The claim made here is that the Linda problem is hard to reconcile with this interpretation; that there is little if any evidence that subjects utilize this interpretation; and that in any case, representativeness can account for all Linda problem results.     

Multivariate data analysis in empirical research

The interpretive benefits of employing multivariate analysis methods on experimental data with more than one dependent variable are described heuristically and illustrated on a set of data from a simply designed experiment in physiological psychology. Multivariate analysis of variance (MANOVA) is performed on the 9 dependent variables contained in the sample data and on the four composites derived from a principal components analysis (PCA) of the variability of the nine. A linear discriminant analysis (LDA) is conducted following both MANOVA results, and 5 methods of determining the “important” dependent variables in the experimental-control group difference are presented and discussed in terms of the data at hand.     

Lexical contribution to nonword-repetition effects: Evidence from event-related potentials

Two experiments investigated the modulation of event-related potentials (ERPs) by the repetition of orthographically legal and illegal nonwords. In Experiment 1, subjects silently counted occasional words against a background of nonwords, a proportion of which were repetitions of an immediately preceding legal or illegal item. ERPs to repeated legal items showed a sustained, topographically diffuse, positive-going shift. In contrast, repeated illegal nonwords gave rise to ERPs showing a smaller and temporally more restricted positive-going modulation. In an attempt to equalize depth of processing across legal and illegal nonwords, subjects in Experiment 2 were required to count items containing a nonalphabetic character against the same background of nonword items. ERPs to repeated legal items showed a modulation similar to, although smaller than, that found in Experiment I, but no effects of repetition were observed in the ERPs to the illegal nonwords. It was concluded that the effects of repeating nonwords, at least as manifested in concurrently recorded ERPs, differ as a consequence of whether items can access lexical memory, and that this is inconsistent with the attribution of such effects solely to the operation of episodic memory processes.     

Mandel'štam and Dante: TheDivine Comedy in Mandel'štam's poetry of the 1930s

Osip Mandel'?tam (1891–1938?) belongs among the greatest Russian poets of the twentieth century. During the thirties, when he led a tragic existence and felt a premonition of his inevitable violent death, Mandel'?tam saw in Dante not only the greatest poet, but also his own superior teacher, and his poems of that period contain a tormented meditation on the masterpiece of Dante's genius — theDivine Comedy. Epic poetry of Dante, Homer, Virgil and others was possible because the inner world of each poet was essentially at one with the ethos of the society in which he lived. Mandel'?tam's inner world was Judaeo-Christian, European, and rooted in classical and neo-Platonic philosophy, but his outer world, consisting of a new Marxist or pseudo-Marxist system, was totally at odds with it. Thus Mandel'?tam could not embody the epic impulse of the society he opposed. He was left with the tormented lyric impulse. The fundamental conflict between Mandel'?tam as a lyric poet and the society in which he had to live and work accounts for the fact that his vision of Stalinist society in a number of respects remarkably corresponds to Dante's vision of a perverted divine order in theInferno.     

Scarcity,engagement, and value

Scarcity has been found to intensify value, positive or negative, rather than simply enhancing it. Some researchers have proposed that scarcity affects value by increasing how much attention is paid to a stimulus. We conceptualized sustained attention as stronger engagement and operationalized a situation of scarcity by telling participants who were choosing between two objects that the object that was chosen would then be replaced (Replenish) or not replaced (Scarce). To distinguish sustained attention-stronger engagement in a situation of scarcity from grabbing attention (salience from distinctiveness), the choice was between one option with a single instance (solitary-high salience) and a second option with several duplicates (abundant-low salience). We predicted that stronger engagement from a situation of scarcity would, first, intensify the value of the chosen item regardless of whether it was solitary or abundant, with positive items becoming more positive and negative items becoming more negative, and second, the stronger engagement from the situation of scarcity would transfer intensification to another separate object in the same setting. The results of Studies 1 and 2 supported both of these predictions. Study 3 tested a boundary condition for these scarcity–engagement effects in terms of how real participants experienced the choice items to be, where ‘realness’ is another source of engagement strength. As expected, the scarcity–engagement effect on intensifying value was replicated for participants who experienced the activity as real but was eliminated for those who did not.     

The Shelf Life of a Safety Climate Assessment: How Long Until the Relationship with Safety–Critical Incidents Expires?

Purpose

This study investigates safety climate as both a leading (climate → incident) and a lagging (incident → climate) indicator of safety–critical incidents. This study examines the “shelf life” of a safety climate assessment and its relationships with incidents, both past and future, by examining series of incident rates in order to determine when these predictive relationships expire.

Design/Methodology/Approach

A survey was conducted at a large, multinational chemical manufacturing company, with 7,467 responses at 42 worksites in 12 countries linked to over 14,000 incident records during the 2 years prior and 2 years following the survey period. Regressions revealed that safety climate predicts incidents of varying levels of severity, but it predicts the most severe incidents over the shortest period of time. The same is true for incidents predicting safety climate, with more severe incidents having a shorter predictive window. For the most critical relationship (climate predicting more severe incidents), the ability of a safety climate assessment to predict incidents expires after 3 months.

Implications

The choice of aggregation period in constructing incident rates is essential in understanding the safety climate–incident relationship. The common yearly count of incidents would make it seem that more severe incidents cannot be predicted by safety climate and also fails to show the strongest predictive effects of less severe incidents.

Originality/Value

This research is the first to examine assumptions regarding aggregation periods when constructing safety-related incident rates. Our work guides organizations in planning their survey program, recommending more frequent measurement of safety climate.     

Epidemics in perspective

Irrational responses to patient with AIDS, particularly in regards to the transmissibility of HIV (human immunodeficiency virus) are examined from an historical and psychosocial perspective. Although these responses are similar to those reported from past epidemics such as plague and leprosy, they are in direct conflict with our current level of understanding regarding the transmission of this virus. Their genesis may relate to the human penchant to react to illness metaphorically. In order to allay effectively public concern about the transmissibility of AIDS, it is essential to recognize the metaphor associated with venereal disease in general and AIDS in particular.     

Generality of a congruity effect in judgements of relative order

The judgement of relative order (JOR) procedure is used to investigate serial-order memory. Measuring response times, the wording of the instructions (whether the earlier or the later item was designated as the target) reversed the direction of search in subspan lists (Chan, Ross, Earle, & Caplan Psychonomic Bulletin & Review, 16(5), 945–951, 2009). If a similar congruity effect applied to above-span lists and, furthermore, with error rate as the measure, this could suggest how to model order memory across scales. Participants performed JORs on lists of nouns (Experiment 1: list lengths = 4, 6, 8, 10) or consonants (Experiment 2: list lengths = 4, 8). In addition to the usual distance, primacy, and recency effects, instructions interacted with serial position of the later probe in both experiments, not only in response time, but also in error rate, suggesting that availability, not just accessibility, is affected by instructions. The congruity effect challenges current memory models. We fitted Hacker’s (Journal of Experimental Psychology: Human Learning and Memory, 6(6), 651–675, 1980) self-terminating search model to our data and found that a switch in search direction could explain the congruity effect for short lists, but not longer lists. This suggests that JORs may need to be understood via direct-access models, adapted to produce a congruity effect, or a mix of mechanisms.     

Statements of Method and Teaching: The Case of Socrates

In this paper, I ponder the question of whether Socrates follows a method of investigation — the method of hypothesis — which he advocates in Plato's Phaedo. The evidence in the dialogue suggests that he does not follow the method, which raises additional questions: If he fails to do so, why does he articulate the method? Does his statement of method affect his actions or is it mainly forgotten? Although Socrates is a fictional character, his actions in the Phaedo suggests questions about the function of espoused methods in actual situations.     

The Adaptation and Validation of Quality of Work Life Scale to Turkish Culture

The aim of this research is to adapt the Quality of Work Life Scale developed by Sirgy et al. (Social Indicators Research, 55, 241–302, 2001) to Turkish culture, and to examine its psychometric properties. The research has been conducted on 254 academics who are affiliated to the Faculty of Education and Faculty of Science and Letters of four different universities in Ankara, Turkey. In order to provide the lingual equivalence, bilingual group pattern was used, and an English version of the scale was applied to a group of 34 academicians who are fluent in both English and Turkish. Nearly 1 month after this application, the Turkish version of the same form was applied once again to the same 34 people. The construct validity of the scale was conducted by using the Confirmatory Factor Analysis method. As a result of the study, it was determined that the original scale and its Turkish form yielded similar results. The fact that internal consistency is high is proved. Croanbach alpha coefficient was found as 0.84. This result indicates that the internal consistency of the test and accordingly the reliability are high and close to the original QWL scale. As a result of the Confirmatory Factor Analysis applied, it was determined that the Turkish form gave a factorial structure which was similar to the original scale and that no problems occurred in the course of using the scale total points. It is concluded that this scale, with its extremely comprehensible language, will contribute to defining the level of quality of the work life of those who work in Turkey and understand their behaviors and attitudes towards their work.     

LQTS Parents’ Reflections About Genetic Risk Knowledge and their Need to Know or Not to Know their Children’s Carrier Status

Long QT syndrome (LQTS) is a contributor to unexplained deaths in infants (SIDS), children, teenagers and young adults. A gene test result may allow for individual tailored treatment, but also pose a burden of knowing one’s carrier status, with no treatment recommendation. Genetic risk knowledge in the case of LQTS can promote adjustment and coping, but also fear anxiety, ambivalence and moral dilemmas. This makes it challenging to respect both the right to know and the right not to know. The purpose of this study was to explore LQTS parents’ perception of genetic knowledge, and their need to know or not to know about their children’s carrier status. Qualitative, semi structured interviews were conducted with thirteen parents of LQTS-children. Results show that parents found it important to know the result of a gene test for LQTS including their children’s carrier status. The risk was framed and incorporated into their everyday life and their life perspectives. Pertinent moral dilemmas concerned information disclosure to children and relatives. Parents thought that early and gradual disclosure to children would promote coping. Parents’ moral dilemmas were rarely addressed during encounters with healthcare providers. The participants had several suggestions for improvement in that regard.     

Choice,consciousness and ideological language

Because psychotherapists are not moral teachers, they ought not to advise their clients about evaluative questions. This means that their advice must be limited to a concern with the client's view of reality. It happens that in our times, there are prefabricated views of reality on offer from a variety of ideologies-Marxism and feminism being currently the most influential. Ideologists not only offer prefabricated realities-called consciousness- but also present a set of arguments to show that because choice is unreal, consciousness is all that matters. Adopting the ideological concept of consciousness thus becomes a backdoor variant of the ultimate sin against scientific method: namely smuggling unsubstantiated, indeed undiscussed, values into therapy.     

Trauma exposure is associated with increased context-dependent adjustments of cognitive control in patients with posttraumatic stress disorder and healthy controls

Recent evidence has suggested that posttraumatic stress disorder (PTSD) is associated with alterations in prefrontal-cortex-dependent cognitive processes (e.g., working memory, cognitive control). However, it remains unclear whether these cognitive dysfunctions are related to PTSD symptomatology or trauma exposure. Furthermore, regarding cognitive control, research has only focused on the integrity of selected control functions, but not their dynamic regulation in response to changing environmental demands. Therefore, the present study investigated dynamic variations in interference control, in addition to overall interference susceptibility and working memory (WM) performance in matched groups of 24 PTSD patients and 26 traumatized and 30 nontraumatized healthy controls. The Simon task was used to measure overall interference susceptibility and the flexible adjustment of cognitive control, on the basis of the occurrence of response conflicts (conflict adaptation effect). WM performance was assessed with the forward and backward digit span tasks. Since we have previously shown that trauma exposure per se is associated with reduced hair cortisol concentrations (HCC), we further explored whether PTSD/trauma-related cognitive alterations are related to HCC in proximal 3-cm hair segments. The results revealed that PTSD patients and traumatized controls showed significantly more pronounced conflict adaptation effects than nontraumatized controls. Moreover, the conflict adaptation effect was positively related to the number of lifetime traumatic events and the frequency of traumatization. The groups did not differ in overall interference susceptibility or WM performance. Exploratory analyses revealed no association between HCC and the observed cognitive differences. These results suggest that context-driven control adjustments constitute a sensitive correlate of trauma exposure, irrespective of PTSD.     

Against Hypothetical Syllogism

The debate over Hypothetical Syllogism is locked in stalemate. Although putative natural language counterexamples to Hypothetical Syllogism abound, many philosophers defend Hypothetical Syllogism, arguing that the alleged counterexamples involve an illicit shift in context. The proper lesson to draw from the putative counterexamples, they argue, is that natural language conditionals are context-sensitive conditionals which obey Hypothetical Syllogism. In order to make progress on the issue, I consider and improve upon Morreau’s proof of the invalidity of Hypothetical Syllogism. The improved proof relies upon the semantic claim that conditionals with antecedents irrelevant to the obtaining of an already true consequent are themselves true. Moreover, this semantic insight allows us to provide compelling counterexamples to Hypothetical Syllogism that are resistant to the usual contextualist response.