Wagon-wheel illusion under steady illumination: real or illusory?

Wheels turning in the movies sometimes appear to rotate backwards. This is called the wagon-wheel illusion (WWI). The mechanism of this illusion is based on the intermittent nature of light in films and other stroboscopic presentations, which renders them as a series of snapshots rather than a continuous visual data stream. However, there have been claims that this illusion is seen even in continuous light, which would suggest that the visual system itself may sample a continuous visual data stream. We examined the rate of this putative sampling and its variations across individuals while in different psychological states. We obtained two results: (i) WWI occurred in stroboscopic lights as expected, (ii) WWI was never reported by our subjects under continuous lights, such as sunlight and lamps with DC power source. Thus, WWI cannot be taken as evidence for discreteness of conscious visual perception.     

Behavioral problems and scholastic adjustment among Bedouin-Arab children from polygamous and monogamous marital family structures: some developmental considerations

Families in the Bedouin-Arab community in Israel are characterized by monogamous and polygamous marriages. Such diversity in family structure occurs in other parts of the world, yet scant empirical evidence exists to refute or to support the claim that polygamous family structure can be a risk factor for children's school maladjustment and negative developmental outcomes. The purpose of the current study was to test this claim. Participants were 255 3rd-grade children from the Negev Bedouin community in Israel. One hundred fifty-three children came from monogamous families that were characterized by 1 wife (i.e., 1-wife families), and 102 children came from polygamous families consisting of 2 wives (i.e., 2-wife families). Teachers completed the Teacher's Report Form of the Child Behavior Checklist (T. M. Achenback, 1991b). A series of logistic regression analyses, after adjusting for maternal education level, revealed that 2-wife children tended to have higher levels of externalizing problems in general and higher levels of attention problems in particular than did their 1-wife counterparts. Also, 2-wife children had higher rates of school absenteeism and lower levels of overall academic achievement than did 1-wife children. Implications for the Bedouin society are discussed.     

The Effect of Spiritual Self-care Training on the Quality of Life of Mothers of Preterm Infants: A Randomized Controlled Trial

The present study was carried out with the aim of determining the effect of spiritual self-care training on the quality of life of mothers of preterm infants. This trial was carried out on 60 mothers with premature infants. Mothers were randomly divided into two intervention and control groups. Training for increasing awareness about the condition of the infants was carried out in both groups. In the intervention group, spiritual self-care training was also done. Data were completed in both groups before, immediately after, and two weeks after the intervention by using the standard WHO quality of life questionnaire. Data were analysed using statistical tests, including ANOVA and Repeated Measures. The results showed that the average quality of life of mothers under study was significantly different at different points of measurement in the intervention group (first, second, and third time-points) (P = 0.016). An increase was observed in the intervention group at the second time-point compared to the first time-point (84.2–88.4, P < 0.001) and in the third time-point compared to the first time-point, (87.9), which was also statistically significant (P < 0.001). According to the results of post hoc tests, there was a decrease in quality of life in the control group at the second time-point compared to the first time-point and the average score of mothers decreased from 82.9 to 75.3, which was statistically significant (P < 0.001). Spiritual self-care training can increase the quality of life and can be used as a form of holistic nursing care for mothers with premature infants in neonatal intensive care units.

     

Suggestions to Improve the Comprehensibility of Current Definitions of Scientific Authorship for International Authors

Science and Engineering Ethics - Much has been said about the need for improving the current definitions of scientific authorship, but an aspect that is often overlooked is how to formulate and...     

Management Strategies of Sexual Dysfunctions

The purpose of this essay is to discuss on the possible impact on a couple's sexual relationships when the male partner's erectile problems contribute to a sexual dysfunction on the part of the female. The complex reciprocal nature of sexual interactions emphasizes the importance of the relationship for sexual function and dysfunction. The treatment of sexual dysfunction then takes into account the contribution of factors from the couple and the system. An integrated behavioural-systems approach is applied to address both sexual and non-sexual aspects of the interaction in the marital unit. This approach outlines a range of methods that may be used during the treatment of sexual dysfunctions in order to bring about relevant changes in sexual functioning and general relationships.     

Mental health of medical students: a cross-sectional study in Tehran

Medical students are subject to stress from sources related to medical training in addition to personal problems, resulting in significant mental distress. This study evaluates the scope of the problem in Tehran medical schools and sheds light on some of its associations. Students (604) of medicine from four medical schools in the city of Tehran responded to the Persian version of 28-item General Health Questionnaire (GHQ-28) in conjunction with a data collection sheet asking about age, sex, marital status, current training level, living place, grade point average in previous semester, and perceptions of their financial status. Of 602 students, 40.7% had mental distress (45.7% of female and 36.7% of male students). Distress was associated with being a woman (female to male odds ratio: 1.55) and very poor financial status (OR: 18.0).     

N-Methyl-D-aspartate receptors in the ventral tegmental area are involved in retrieval of inhibitory avoidance memory by nicotine

The interaction of opiate, cholinergic, glutamatergic and (possibly) dopaminergic inputs in the ventral tegmental area (VTA) influencing a learned behavior is certainly a topic of great interest. In the present study, the effect of intra-VTA administration of N-methyl-d-aspartate (NMDA) receptor agents on nicotine's effect in morphine state-dependent learning was investigated. An inhibitory avoidance (IA) task was used for memory assessment in male Wistar rats. Subcutaneous (s.c.) administration of morphine (5 and 7.5mg/kg) immediately after training decreased IA response on the test day, which was reinstated by pre-test administration of the same doses of the opioid; this is known as state-dependency. Moreover, pre-test administration of nicotine (0.2, 0.4 and 0.6 mg/kg, s.c.) also reversed the decrease in IA response because of post-training morphine (5mg/kg). Here, we also show that when infused into the VTA before testing, NMDA (0.01 and 0.1 microg/rat) reverse the post-training morphine effect on memory. In addition, the sub-effective doses of NMDA (0.0001 and 0.001 microg/rat) in combination with a low dose of nicotine (0.1mg/kg) which had no effects by themselves, synergistically improved retrieval of IA memory on the test day. In contrast, pre-test administration of a competitive NMDA receptor antagonist D-AP5 (0.5, 1 and 2 microg/rat) which had no effect alone prevented the nicotine reversal of morphine effect on memory. Our data indicate that NMDA receptors in the VTA are involved in the reversing effect of nicotine on morphine induced state-dependency.     

Does digital content marketing affect tourism consumer behavior? An extension of technology acceptance model

With the rapidly dramatic environmental change and intensive competition, tourism organisations are required to adopt advanced marketing strategies and techniques. Recently, digital content marketing (DCM) has become one of the most prominent marketing tools that has substantial benefits and influences in different settings and domains. To this end, it is crucial to understand the effect of DCM on consumer behavior within the tourism context. Therefore, this research empirically examines an extended technology acceptance model (TAM) model to investigate and compare the influence of DCM on travel and tourism consumer behavior in two distinct countries in the Middle East and North Africa (MENA) region. A quantitative approach was adopted by collecting surveys from a convenience sample of 285 and 122 participants in Egypt and Oman, respectively. The findings of PLS‐structural equation modelling revealed that the TAM major constructs were good elucidating the attitude and behavior toward using of DCM for tourism purposes. It is also found that perceived enjoyment and perceived convenience are antecedents of customers' attitudes, which in turn, influence their intention and behavior of using DCM to buy or select a certain tourism product/service. The current study contributes to knowledge of DCM literature in the tourism field in general and within the MENA region in particular. It also adds to studies on TAM and digital technologies by extending two critical constructs related to tourism consumer behavior. The practical implications will greatly support tourism marketers and authorities to develop their tourism strategies and marketing activities. Future research can be expanded to study different target groups comprehending region differences.     

Emotion Efficacy Improves Prediction of HIV/AIDS Risky Behaviors: A Modified Information-Motivation-Behavioral Skills Model

Journal of Rational-Emotive & Cognitive-Behavior Therapy - Although the information-motivation-behavioral (IMB) skills model is a functional and well-known model for HIV/AIDS prevention, there...