Counting Chicks Before They Hatch: Female Cowbirds Can Time Readiness of a Host Nest for Parasitism

ABSTRACT— Here we show that demands associated with brood parasitism have favored sophisticated cognitive abilities in female brown-headed cowbirds. We discovered that cowbirds can use the rate at which eggs are added to a nest across days to assess the readiness of the nest for incubation, which would allow them to synchronize laying with the host and avoid nests where incubation has most likely commenced. In three experiments, cowbirds investigated and laid eggs in artificial nests that differed in the number of eggs they contained. Across days, we added eggs to nests at different rates to simulate differences in the timing of reproduction of the hosts. Cowbirds avoided a nest if the number of eggs that had been added was less than the number of days that had elapsed. The ability of females to remember egg number and compare changes in egg number across days allows them to select nests most suitable for parasitism.     

A Qualitative and Quantitative Review of Antecedents of Counterproductive Behavior in Organizations

This paper presents a qualitative and quantitative review of the antecedents of counterproductive behaviors (CPB). The qualitative review organizes antecedents identified in past research into four broad categories: personal, organizational, work, and contextual factors. The quantitative review includes metaanalyses of 40 published studies with a combined sample size of 42,359. The results indicate that employees who are young or dissatisfied engage in more CPBs. In addition, absenteeism is more prevalent among employees who are young, female, have lower income, have lower job satisfaction, and who perceive a stronger absence norm, or a stronger ability to be on time.     

The Effects of the Selective Consideration of Alternatives on Consumer Choice and Attitude–Decision Consistency

There are many instances of consumer decision making in which more consideration is given to 1 brand than to others in the choice set. This research explored how selective consideration of a brand affects attitudes toward the brand, relative standing of the focal brand within the choice category, and decision making. Experiment 1 demonstrated that when participants were prompted to consider a randomly determined focal alternative, that alternative was more likely to be chosen than nonfocal alternatives. Moreover, willingness to pay for an alternative was higher if it was the focus of consideration. Attitudinal data suggest that the selective consideration effect occurred because attitudes toward the focal alternative became more positive compared to those toward other alternatives in the choice set. Experiment 2 elucidated this attitudinal effect by demonstrating that selective consideration could cause the extremity of consumers’ attitudes toward a focal brand to become more positive. Experiment 3 explored the potential of the selective consideration of a focal alternative to influence the consistency between consumers’ attitudes and decisions and established that the initial attitude toward a focal alternative moderated the selective consideration effect.     

The Transcendence and Non-Discursivity of the Lifeworld

This paper points to two little-discussed interrelated features—among sociologists—about the nature of the lifeworld (Lebenswelt): that the experience of transcendence is an essential component of human actions, and that lived experience (Erlebnis) is founded on the non-discursivity of the lifeworld, i.e., the pre-predicative background expectancies from which the discursive arises. I examine the intellectual route of Alfred Schutz who developed his mundane lifeworld theory from appropriating Edmund Husserl’s notions of appresentation and apperception. Harold Garfinkel later extended Schutz’s concept of lifeworld to the empirical investigations of constitutive social orders. By way of conclusion, I warn against a strain of constructionism in sociology, which tends to ignore the two said features of lived experience and inaccurately conceives social realities as essentially the actor’s discursive accomplishments.

A Paradigm Shift in the Implementation of Ethics Codes in Construction Organizations in Hong Kong: Towards an Ethical Behaviour

Science and Engineering Ethics - Due to the economic globalization which is characterized with business scandals, scholars and practitioners are increasingly engaged with the implementation of...     

Is the History of our Universe Finite?

Modern cosmology indicates that our universe has a finite age. However, it is not understood whether the initial state before the Big Bang is finite in history or not. In this article, I show by simple arguments that the initial state must be finite in history if it is real. If the initial state is not real, a special transition is needed to specify the beginning of the real time. Moreover, if our universe is just one of the many universes, it can be shown that the history of the universe generator must also be finite.     

An investigation into the temporal dimension of the Mozart effect: evidence from the attentional blink task

In the present study, we examined whether the 'Mozart effect' would influence participants' temporal attention using a visual attentional blink (AB) task that provides a reliable measure of the temporal dynamics of visual attention. The 'Mozart effect' refers to the specific claim that listening to Mozart's Sonata for Two Pianos in D Major, K.448 can improve the performance in spatio-temporal tasks. Participants had to try and identify two target digits (in their correct order of presentation) presented amongst a stream of distractor letters in three different conditions (presented in separate blocks of trials): while listening to the Mozart sonata played normally, while listening to the same Mozart sonata played in reverse, and while in silence. The results showed that the participants were able to detect the second target (T2) significantly more accurately (given the correct detection of the first target, T1) in the AB stream when the Mozart sonata was played normally than in either of the other two conditions. Possible explanations for the differential effects of Mozart's music being played normally and in reverse and potential confounds in previous studies reporting a facilitatory 'Mozart effect' are discussed. Our results therefore provide the first empirical demonstration supporting the existence of a purely temporal component to the 'Mozart effect' using a non-spatial visual AB task.     

The ameliorating effect of oroxylin A on scopolamine-induced memory impairment in mice

Oroxylin A is a flavonoid and was originally isolated from the root of Scutellaria baicalensis Georgi., one of the most important medicinal herbs in traditional Chinese medicine. The aim of this study was to investigate the ameliorating effects of oroxylin A on memory impairment using the passive avoidance test, the Y-maze test, and the Morris water maze test in mice. Drug-induced amnesia was induced by administering scopolamine (1 mg/kg, i.p.) or diazepam (1 mg/kg, i.p.). Oroxylin A (5 mg/kg) significantly reversed cognitive impairments in mice by passive avoidance and the Y-maze testing (P<.05). Oroxylin A also improved escape latencies in training trials and increased swimming times and distances within the target zone of the Morris water maze (P<.05). Moreover, the ameliorating effects of oroxylin A were antagonized by both muscimol and diazepam (0.25 mg/kg, i.p., respectively), which are GABA(A) receptor agonists. Furthermore, oroxylin A (100 microM) was found to inhibit GABA-induced inward Cl(-) current in a single cortical neuron. These results suggest that oroxylin A may be useful for the treatment of cognitive impairments induced by cholinergic dysfunction via the GABAergic nervous system.     

Is optimal vision required for the successful execution of an interceptive task?

The importance of optimal visual function in demanding interceptive tasks is far from established. The aim of the study was to determine whether induced myopic blur and hence sub-optimal visual function would give rise to a detrimental effect on performance in the execution of an interceptive task. The batting performance of grade level cricket players was assessed facing a bowling machine whilst wearing contact lenses of four different refractive conditions (plano (nil), +1.00, +2.00 and +3.00D over-refraction), inducing increasing amounts of myopic blur. Performance for each condition was assessed based both on the shot quality against each delivery judged by a qualified cricket coach blind to each condition, along with an evaluation of the quality of ball-bat contact for each delivery. No significant change was found in batting performance with the introduction of +1.00 and +2.00D of induced myopic blur. A +3.00D over-correction was required before any significant decrease in batting performance was detected, demonstrating that batters needed to be essentially legally blind (as simulated through the use of the +3.00D over-refraction) before there was any significant measurable decrement in batting performance. We concluded that optimal visual correction is not necessarily required for optimal performance in a demanding interceptive task, and that the human perceptual-motor system is capable of compensating for marked alterations in input.     

Effects of interactional justice on egocentric bias in resource allocation decisions

Three studies demonstrated that interactional justice was able to attenuate egocentric bias, i.e., the tendency to regard a larger share for oneself as fair. Study 1, an experimental study of negotiation, showed that fair interpersonal treatment led to a smaller egocentric bias, quicker settlements, and fewer stalemates. Study 2 showed that fair treatment was related to a smaller egocentric bias in a real-life context. University students were more willing to accept a higher tuition fee and less willing to cut the salary of their teachers if the interpersonal treatment received from the teachers was more positive. Study 3 showed experimentally that in support of fairness heuristic theory, when the fair interpersonal treatment received could be attributed externally, its attenuating effect on the egocentric bias disappeared.