An evidential support accumulation model of subjective probability

A model of cue-based probability judgment is developed within the framework of support theory. Cue diagnosticity is evaluated from experience as represented by error-free frequency counts. When presented with a pattern of cues, the diagnostic implications of each cue are assessed independently and then summed to arrive at an assessment of the support for a hypothesis, with greater weight placed on present than on absent cues. The model can also accommodate adjustment of support in light of the baserate or prior probability of a hypothesis. Support for alternatives packed together in a "residual" hypothesis is discounted; fewer cues are consulted in assessing support for alternatives as support for the focal hypothesis increases. Results of fitting this and several alternative models to data from four new multiple-cue probability learning experiments are reported.     

Episodic memory and the hippocampus: it's about time

Several recent studies have sought to develop animal models of episodic memory, the capacity to recollect unique personal experiences. However, these studies have not yet provided unambiguous evidence that this capacity is based on recollection of the learning episodes. A recent study that examined memory for the ordering of events within unique experiences, and demonstrated a critical and selective role for the hippocampus, suggests a new and promising model for neurobiological analyses of episodic memory.     

中学生学习策略运用、学习效能感、学习坚持性与学业成就关系的研究

本研究随机选取初一、初二、高一、高二年级共442人为被试,采用协方差结构模型考察了中学生学习策略运用、学习效能感、学习坚持性与学业成就之间的关系。研究结果表明：(1)学习策略运用、学习效能感、学习坚持性与学业成就之间都存在显著的正相关;(2)学习策略运用、学习效能感直接影响学生的学业成就,学习坚持性则通过影响学生学习策略的运用间接影响学业成就,学习效能感与学习坚持性二者相互影响;(3)学习策略运用、学习效能感、学习坚持性对学业成就的影响效应依次为,学习效能感最大,学习策略运用其次,学习坚持性再次。     

选择性注意加工机制上学困生和学优生的比较研究

本实验使用正、负启动技术 ,在严格控制各种条件下比较学困生和学优生在选择性注意加工机制———目标激活和分心物抑制方面的差异 ,进而探讨学困生在选择性注意加工机制上所存在的问题。结果显示 ,学困生和学优生的正启动量差异不显著 (p >0 .0 5 ) ,但学困生的负启动量显著小于学优生 (p <0 .0 0 1。这一结果说明 ,学困生在对目标反应期间易受分心物干扰 ,其抑制分心物干扰的能力较弱。同时启示我们应注重训练学困生抑制分心物干扰的能力     

Adding emotionality to seductive details—Consequences for learning?

According to the seductive detail effect, adding interesting but irrelevant information (i.e., seductive details) can be detrimental to learning success. In this study, it was explored within two experiments whether the valence of text‐based seductive details might affect learning outcomes differently. For Experiments 1 and 2, we pretested text‐based seductive details for their emotional valence (n = 32 or n = 25 students, respectively). For the main studies of Experiments 1 (n = 105) and 2 (n = 131), university students were randomly assigned to one of four conditions that varied with respect to the presence of seductive details and their emotional valence (no vs. positive vs. negative vs. neutral). Unexpectedly, results revealed in both experiments no seductive details effect and also no differences between the three seductive detail conditions for the used learning outcome measures retention and transfer. Possible reasons for these findings and their implications are discussed.     

注意负荷对内隐序列学习的影响研究

运用次级任务研究范式,采用符号计数的次级任务和歧义序列中的次级条件序列,将内隐序列学习分为单任务组和双任务组,统一在单任务条件下测试。结果发现:(1)两组被试内隐学习成绩差异不显著;(2)双任务组被试在学习组块和测试组块的内隐学习差异也不显著。结果进一步支持了在次级任务占用注意资源的条件下内隐学习仍然可以正常地获得、内隐序列学习不受注意负荷影响的观点。     

婴儿共同注意能力的发展

本研究采用严格的实验室测验法,从年龄趋势、学习能力、性别差异三方面考察了8～11个月婴儿共同注意能力的发展。结果表明：1）婴儿的共同注意力在8～11个月间逐步提高,9个月左右出现显著的发展性变化,但1岁以前,该能力的发展水平都较低;2）就共同注意而言,婴儿具有从练习经验中学习的可能性,且学习能力存在年龄差异,8个月的婴儿基本不能从练习中受益,而8个月以上的其他三组婴儿在练习后共同注意水平都有不同程度的提高;3）总体而言,女婴共同注意能力的发展水平显著地高于男婴。     

两类数学学习困难小学儿童抑制控制水平的实验研究

为考察单纯型数学困难与混合型数学困难小学儿童的抑制控制水平及特点,使用Stroop色词命名测验和颜色匹配反转作业,对各30名的单纯型困难、混合型困难和对照组小学儿童的优势反应抑制能力进行测试、分析。结果发现:单纯型数学困难儿童抑制优势反应的能力显著低于对照组,但其对事物初次学习的能力与对照组相当;混合型数学困难儿童在对事物初次学习能力及对优势反应的抑制能力方面均显著低于对照组儿童,其中对事物的初次学习能力也显著低于单纯型数学困难儿童。     

THE “WHERE IS IT?” REFLEX: AUTOSHAPING THE ORIENTING RESPONSE

The goal of this review is to compare two divergent lines of research on signal-centered behavior: the orienting reflex (OR) and autoshaping. A review of conditioning experiments in animals and humans suggests that the novelty hypothesis of the OR is no longer tenable. Only stimuli that represent biological “relevance” elicit ORs. A stimulus may be relevant a priori (i.e., unconditioned) or as a result of conditioning. Exposure to a conditioned stimulus (CS) that predicts a positive reinforcer causes the animal to orient to it throughout conditioning. Within the CS-US interval, the initial CS-directed orienting response is followed by US-directed tendencies. Experimental evidence is shown that the development and maintenance of the conditioned OR occur in a similar fashion both in response-independent (classical) and response-dependent (instrumental) paradigms. It is proposed that the conditioned OR and the signal-directed autoshaped response are identical. Signals predicting aversive events repel the subject from the source of the CS. It is suggested that the function of the CS is not only to signal the probability of US occurrence, but also to serve as a spatial cue to guide the animal in the environment.