Precuing an isolated stimulus temporarily outweighs in-stream stimulus facilitation

The flash-lag effect (FLE), when studied in rapid serial visual presentations, has shown that participants perceived a target presented in a stream prior to its simultaneous out-of-stream replica (T. Bachmann & E. P?der, 2001). In the present study, the authors introduced a precue to the single flashed, isolated target to see if drawing bottom-up attention to the flash also would compensate for the effects of the mechanisms that influence the processing of in-stream items. The extent of the flash-lead effect in the precued condition was considerably larger than the lead-effect in earlier experiments and in a control experiment where no precue was presented for the flashed targets. For the first 200-250 ms from the beginning of the stream, flash-lead dominated. The FLE did not appear until 400 ms after stream onset. The authors interpret results as the combined relative effects of in-stream target masking, in-stream sensory facilitation, and spatial-attentional facilitation.     

Validation of Acceptance of Coercive Sexual Behavior (ACSB): a multimedia measure of adolescent dating attitudes

The psychometric properties of the Acceptance of Coercive Sexual Behavior (ACSB), a multimedia measure of adolescent dating attitudes, were examined. The ACSB is an interactive instrument that uses video vignettes to depict adolescent dating situations. Analyses of the measure's factor structure, internal consistency, test-retest reliability, and validity were conducted with separate samples of male (n = 106) and female (n = 114) high school students. Validity was evaluated in relation to subscales on the Sexual Attitudes Survey and self-reports of dating and sexual experiences. Factor analyses on the ACSB yielded two factors, Coercion and Consent. The ACSB demonstrated acceptable psychometric properties. Advantages of using a multimedia assessment of sexually coercive attitudes with adolescents are discussed.     

Omnia tempus habent: habitat-specific differences in olfactory learning and decision making in parasitic wasps

Olfactory learning is generally involved in the host-finding process in parasitic wasps. But the reliability of odour cues for predicting future host-finding success depends on the rate at which host-substrate associations are subject to variation within and between parasitoid generations. Since learning comes at physiological costs, we can expect animals to learn in a way that optimizes costs and benefits. The parasitic wasp Venturia canescens occurs in two reproductive modes that forage in different environments. We tested populations from both habitat types for learning rate, memory duration and speed of decision making and found considerable differences. Thelytokous wasps live in habitats with relatively stable host–substrate associations and might encounter hosts at a high rate. They showed a preference for a new odour after only a single experience. However, the response faded within 24 h, even with spaced learning experiences. Arrhenotokous wasps live in habitats where hosts are scarce and are likely to be found on a variety of substrates. Like the thelytokous ones, arrhenotokous wasps learned a new odour after a single experience, but seemingly took long for information processing: one and four hours after an experience, a speed–accuracy trade-off became visible, while 24 h after the experience, wasps decided quickly and in accordance with what they had learned. In addition, these wasps are likely to have developed an aversion response towards Geraniol in the CleanAir experiment. We conclude that the respective cognitive pattern can be attributed to the ecological circumstances of the wasp’s natural habitat.     

An Empirical Examination of Religious/Spiritual Struggle Among Israeli Jews

The current investigation examined the prevalence, predictors, and psychological implications of religious and spiritual (r/s) struggles among a sample of Israeli-Jewish university students. R/s struggle was assessed by the Religious and Spiritual Struggles (RSS) Scale. This is a newly constructed scale that assesses a wide array of r/s struggles. The RSS is composed of six factors of struggles: Divine, Doubt, Demonic, Interpersonal, Moral, and Ultimate Meaning. Confirmatory factor analysis of the RSS in this study confirmed this six-factor structure. Of the 164 Jewish participants, between 1.2% and 30.5% experienced various r/s struggles. Beliefs in a cruel God and distant God, religious participation, and fundamentalism predicted higher levels of different types of struggle. All six forms of struggle were correlated with greater psychological distress. In regression equations including r/s struggles and demographic and religious variables, Moral struggles predicted lower life satisfaction, Divine struggles predicted depressive symptoms, and both Divine and Doubt struggles predicted generalized anxiety. Possible explanations and implications of the findings are offered. We conclude by pointing to the limitations of the study and suggesting a few directions for future research.     

Molecular reduction: reality or fiction?

Neurophysiological research suggests our mental life is related to the cellular processes of particular nerves. In the spirit of Occam’s razor, some authors take these connections as reductions of psychological terms and kinds to molecular- biological mechanisms and patterns. Bickle’s ‘intervene cellularly/molecularly and track behaviourally’ reduction is one example of this. Here the mental is being reduced to the physical in two steps. The first is, through genetically altered mammals, to causally alter activity of particular nerve cells, i.e. neurons, at the molecular level and then, under controlled experimental conditions, to use generally-accepted rules of behaviour within psychology to monitor the results of these manipulations. In this article, we argue that Bickle’s case example for molecular reduction, i.e. the reduction of long-term memory to its cellular-molecular mechanisms, cannot support his claims, because it turns out that his chosen molecular pathway is neither a sufficient nor a necessary condition for the memory consolidation switch, and thus, instead of rejecting the multiple realization argument, Bickle’s argument actually speaks in favour of it. Therefore the idea of reductive connections between our mental life and the activity of particular nerves is, at present, still more fiction than reality.     

How to measure patch encounter rate: decision-making mechanisms in the parasitic wasp <Emphasis Type="Italic">Asobara tabida</Emphasis>

Parasitic wasps are faced with the decision of where and for how long to search for hosts. Their leaving decisions depend on the rate at which new host-containing patches are encountered: parasitoids increase foraging efficiency by leaving earlier when patch encounter rates become higher. The mechanisms by which these often tiny insects can assess patch encounter rates have not been thoroughly investigated so far. The aim of the present study, where females of the braconid wasp Asobara tabida encountered patches after varying time intervals, was to measure the shape of the travel–time response curve and to analyse how information on inter-patch distances is translated into foraging behaviour. I examined several proxies for travel-time duration, like those of physiological nature as egg content, cues of senescence, amount of energy spent, or muscle fatigue, as well as true cognitive mechanisms, like measurement of distance or interval timing. Constraints in the wasp’s ability to detect patch borders accurately after travelling, e.g. habituation to the patch odour or receptor blocking, are also discussed. From the data presented, most of the above-mentioned mechanisms and constraints can be rejected to work for A. tabida. The effects of inter-patch travel time are strongest when they are short, and even though it cannot be excluded that time measures are processed using an internal clock, I suggest that a Bayesian-like mechanism of timing, the biological basis of which might involve the build-up of neurosecretory material, is the most likely candidate influencing leaving decisions in A. tabida.