The role of attention in eye-movement awareness

People are unable to accurately report on their own eye movements most of the time. Can this be explained as a lack of attention to the objects we fixate? Here, we elicited eye-movement errors using the classic oculomotor capture paradigm, in which people tend to look at sudden onsets even when they are irrelevant. In the first experiment, participants were able to report their own errors on about a quarter of the trials on which they occurred. The aim of the second experiment was to assess what differentiates errors that are detected from those that are not. Specifically, we estimated the relative influence of two possible factors: how long the onset distractor was fixated (dwell time), and a measure of how much attention was allocated to the onset distractor. Longer dwell times were associated with awareness of the error, but the measure of attention was not. The effect of the distractor identity on target discrimination reaction time was similar whether or not the participant was aware they had fixated the distractor. The results suggest that both attentional and oculomotor capture can occur in the absence of awareness, and have important implications for our understanding of the relationship between attention, eye movements, and awareness.     

Effects of diurnal variation and caffeine consumption on Test of Variables of Attention (TOVA) performance in healthy young adults

The Test of Variables of Attention (TOVA) is a continuous performance test (CPT) that assesses attention, impulsivity, and processing speed. CPTs are used in the assessment of attention-deficit/hyperactivity disorder (ADHD) in children, but more young adults are being assessed for ADHD as well. The TOVA norms are based on a standardization sample that was tested early in the day, and any TOVA administered after 1:00 p.m. will be flagged as potentially invalid. Whereas the testing time recommendations make sense for pediatric samples, it is unclear whether they are appropriate for young adults in college, who typically show significant phase delay in their diurnal rhythms. In addition, many college students consume large amounts of caffeine, and it is unclear how caffeine consumption affects TOVA performance. The current study examined the impact of time of day, self-reported diurnal preference, and caffeine consumption on TOVA performance in a double-blind, placebo-controlled experiment with healthy college students. There was evidence of diurnal variation on average response time and impulsivity but not on overall ADHD score, with participants tested in the afternoon responding faster but making more commission errors than did participants tested in the morning. Caffeine consumption led to significantly faster response times, but only for participants who typically consumed relatively little caffeine. We conclude that the TOVA can be administered to young adults outside the recommended time constraints without compromising the validity of test score interpretation but that the caffeine consumption of participants should be closely monitored.     

马克思与罗尔斯论资本主义及市场的正义

马克思和罗尔斯似乎有着十分不同的正义观。马克思主张,正义概念的功能,在意识形态上表现为以主导生产模式所要求的操行,作为具有普遍约束性的律令。罗尔斯则主张,正义是社会制度的第一美德,它的法则可能被所有这样的人所认可:他们公正、合理地商讨的问题,是如何公平划分彼此之间在社会合作中的负担和利益。尽管体现在马克思和罗尔斯立场之间的种种重要不同仍然存在,但笔者认为,这两种正义观上显然不同的立场,是能够调和的。尽管受到黑格尔和康德的不同影响,马克思和罗尔斯的观点还是能显示出一致之处。在提出明确的正义政治概念时,罗尔斯认为,可以接受的正义原则,必须是在社会体制中能够实行的。这导致他的“康德式构成主义”,向黑格尔的观点靠近,在这一点上,马克思奠定了他对普遍的、社会先验的正义原则的拒斥。笔者认为,马克思和罗尔斯两人所追问的,都可以被看作是何种社会制度能够实现作为公平的正义原则。不过,其间仍有两点重要不同。首先,马克思憧憬的,似乎是一种超越休谟和罗尔斯所谓“正义环境”的社会,而对罗尔斯(2001,P177)来说,超越正义环境的社会则是乌托邦。其次,马克思认为,作为社会基础的市场关系应该被超越,因为这些市场关系天然地包含着生产者与生产的社会过程以及社会劳动产品的异化。虽然在超越正义环境的社会里,市场的消亡也许可能,罗尔斯却宣称,在要求必须公正解决竞争的任何社会里,市场消亡均不可能。笔者认为,如果将马克思对市场的拒绝,看作是从根本上拒绝“商品拜物教”,那么马克思和罗尔斯的立场就能调和。笔者的结论是,除了马克思关于未来无阶级社会概念中含有理想成分外,在资本主义及市场的正义观上,马克思和罗尔斯的立场相当接近。     

Can false memories be corrected by feedback in the DRM paradigm?

Normal processes of comprehension frequently yield false memories as an unwanted by-product. The simple paradigm now known as the Deese/Roediger-McDermott (DRM) paradigm takes advantage of this fact and has been used to reliably produce false memory for laboratory study. Among the findings from past research is the difficulty of preventing false memories in this paradigm. The purpose of the present experiments was to examine the effectiveness of feedback in correcting false memories. Two experiments were conducted, in which participants recalled DRM lists and either received feedback on their performance or did not. A subsequent recall test was administered to assess the effect of feedback. The results showed promising effects of feedback: Feedback enhanced both error correction and the propagation of correct recall. The data replicated other data of studies that have shown substantial error perseveration following feedback. These data also provide new information on the occurrence of errors following feedback. The results are discussed in terms of the activation-monitoring theory of false memory.     

A Terror Management Perspective on the Persuasiveness of Fear Appeals

We use terror management theory (TMT) to show that the nature of the threatening consequences included in fear‐appeal communications influences the responses to the messages promoted in such communications. On the basis of differences between death‐related consequences and non‐death‐related consequences, they provide an explanation for maladaptive responses to fear appeals. Results from 2 experiments indicate that participants who were highly committed to a worldview of drinking alcohol rejected socially acceptable attitudes toward drinking and driving when the message containing such attitudes was accompanied by a fear appeal that contained death as a consequence, but not when fear appeals contained the fear of arrest or serious injury. Participants perceived their level of experienced fear to be the same across the experimental conditions. The results have implications for considering the qualitative nature of the threatening consequence in fear‐appeal research and for using TMT to understand maladaptive responses to fear‐appeal communications.     

Who Cares What She Thinks, What Does He Say? Links between Masculinity, In-Group Bonding and Gender Harassment

Previous research has linked threats to masculinity and gender harassment, the most pervasive form of sexual harassment. Using a computer harassment paradigm, an ingroup bonding explanation of this link was directly examined. The study was conducted with heterosexual male undergraduate students from an inner city Australian university. Participants received a threat to masculinity before being exposed to an ostensible gender ingroup member whose reaction to sexist jokes was manipulated. Data from 74 participants revealed that men high on conformity to masculine norms altered their behavior to correspond with feedback from the gender ingroup member after a masculinity threat, whereas men low on conformity to masculine norms rejected gender ingroup feedback after a masculinity threat. A variable examining reported liking of the gender ingroup member produced a similar pattern, while no changes were observed in reported liking of a gender outgroup member These results suggest that the perceived response of other members of the gender ingroup, but not members of the gender outgroup, influence men’s proclivity to enact gender harassing behaviors.     

Distinctiveness effects in children's long-term retention

In 3 experiments, kindergarten and second-grade children's retention was examined in the context of 2 distinctiveness manipulations, namely, the von Restorff and bizarre imagery paradigms. Specifically, children learned lists of pictures (Experiments 1a and 1b) or interactive images (Experiment 2) and were asked to recall them 3 weeks later. In Experiments 1a and 1b, distinctiveness was manipulated perceptually (changing colors) and conceptually (changing categories or switching to a numeral), whereas in Experiment 2, distinctiveness concerned the interaction (common or bizarre) between the referents. The results showed that (a) older children retained more information than younger children, (b) younger but not older children failed to benefit from numerically distinct information, and (c) distinctiveness in other domains facilitated children's retention. These results highlight the importance of distinctive information in children's retention.     

A confirmatory factor analysis of the Impact of Event Scale using a sample of World War II and Korean War veterans

This study assessed the factor structure of the Impact of Event Scale (IES), a measure of intrusion and avoidance, using a sample of World War II and Korean War veterans who had experienced combat 40-50 years earlier. A series of 3 confirmatory factor analytic models were specified and estimated using LISREL 8.3. Model 1 specified a 1-factor model. Model 2 specified a correlated 2-factor model. Model 3 specified a 2-factor model with additional cross-factor loadings for Items 2 and 12. Model 3 was found to fit the data. In addition, this model was found to be a better explanation of the data than the other models. Also in addition, the correlations between the Intrusion and Avoidance factors and the 4 subscales of the 28-item General Health Questionnaire were examined to determine the distinctiveness of the two IES factors.     

Cholinergic modulation of trace conditioning trained in serial compound: A developmental analysis

In four experiments the effects of serial compound conditioning on responding to a trace-conditioned CS were evaluated using a fear conditioning paradigm. The subjects were 18- and 25-day-old Sprague-Dawley rats, previously shown to exhibit little or no trace fear conditioning. Here, animals as young as 18 days of age were shown to be capable of trace conditioning between a visual CS1 and a shock US, provided the trace interval was filled with a non-target CS2 during serial conditioning trials (CS1-->CS2-->US). To explore cholinergic mechanisms involved in trace and serial conditioning, additional experiments assessed conditioned responding following pre-training administration of the muscarinic receptor antagonist scopolamine. Scopolamine produced a dose-dependent reduction in responding to the trace CS1, regardless of whether subjects were trained with standard trace (CS1-->trace interval-->US) or serial (CS1-->CS2-->US) trials. Responding to CS2 was unaffected by scopolamine. These data suggest that central cholinergic systems are functional in the young animals, but are not normally sufficiently activated by standard trace conditioning procedures. The results suggest that serial compound conditioning can promote trace conditioning in young rats, as it does in adults, perhaps by enhancing cholinergic activity during training. Implications for the late ontogenetic emergence of trace conditioning as it relates to maturation of neural pathways and their role in the potentiating effects of a gap filler are discussed.