记忆的前向测试效应对老年人学习新事物的作用

为检验前置测试是否可以有效地提升老年人学习新事物的能力,参与实验的老年人被随机分为有前置测试的实验组和无前置测试的对照组,在实验1中学习了5列单词,在实验2中记忆了5列日用品,在实验3中学习了4段讲座视频。结果表明,实验组老年人对新事物的记忆成绩均高于对照组的老年人。结论认为,前置测试能够显著提升老年人学习新事物的能力,干扰降低与学习参与相结合的\"加减\"理论能更好地解释提升老年人记忆的前向测试效应。     

语言理解中抑制机制的研究概况

抑制是语言理解中的一种重要的认知加工机制。该简要介绍了语言理解中抑制的概念、分类和有关抑制机制的建构一整合模型、结构建构框架等理论;同时,概括介绍了对语言内部无关或不适当信息干扰的抑制、对来自语言外部无关信息干扰的抑制以及跨通道语言理解过程中有关抑制的研究。     

阅读中课文语境对汉语单词识别的影响

三项实验探讨了阅读中课文语境对单词识别的影响。实验一和二分别在两种课文呈现速度条件下,观察课文语境对词汇决策任务的影响,发现仅在较快的呈现速度(每隔150ms呈现一字)和目标词在前文语境中的可预测性为90％以上时,才产生课文语境的促进效应和抑制效应,并表现出抑制优势模式。实验三采用较自然的校对作业考察这种效应,结果显示在目标词高可预测(在前后文中的可预测性为83％以上)时,存在较显著的整体语境效应,并仍表现出抑制优势模式。据此,本文讨论了课文语境中的单词识别过程和语境对它的作用机制。     

字距在视觉干扰中作用的实验研究

本研究分别以字距和刺激呈现的时序为变量,采用同一异匹配作业和视搜寻范型,通过两个实验论证,字距因素是导致语境产生视觉干扰的一种必要而充分的条件。     

Emotional distress and the perceived interference of menstruation

The relation of perceived interference of menstruation on expected behaviors to emotional distress was examined. It was predicted that the perceived interference of menstruation would be more predictive of emotional distress associated with menstruation than either menstrual or premenstrual pain. Participants completed measures of menstrual pain and visual analogue scales of emotional distress (anger, frustration, depression, anxiety, fear). Measures of perceived ability to tolerate the pain, the perceived interference of the pain, and attitudes toward menstruation were also collected. Results indicated that perceived interference was the strongest predictor of emotional distress secondary to menstrual pain. Ratings of menstrual and premenstrual pain were also significant predictors of emotional distress. Results supported the major hypothesis of the study and provide evidence that the appraisal of interference imposed by a particular condition or Stressor may be an important factor in stress and coping processes.     

Note on delay-interval illumination effects on retention in monkeys (Cebus apella).

Two monkeys experienced with delayed matching to sample were given a 30-day baseline training period during which the delay interval was illuminated. Both subjects showed an increase in matching accuracy when shifted to dark delay intervals, and accuracy declined when the illuminated delay interval was reinstituted. These results, as well as earlier reports of facilitation of delayed matching behavior by dark delay intervals, support the view that the absolute level of delay-interval illumination can importantly affect visual retention in monkeys and may be indicative of significant differences in the retention mechanisms employed by monkeys and birds.     

Discrimination training facilitates pigeons' performance on one-trial-per-day delayed matching of key location

Six pigeons were tested on a one-trial-per-day variant of delayed matching of key location. In one condition, a trial began with the illumination of a pair of quasi-randomly selected pecking keys in a large 10-key test box. Pigeons' pecks to one key (the sample) were reinforced with 8-second access to grain on a variable-interval 30-second schedule, whereas pecks to the other key (the distractor) had no scheduled consequences. In the second condition, the nonreinforced distractor was not presented. In both conditions, subjects were removed from the apparatus after 15 minutes and placed in a holding cage. Subjects were subsequently replaced in the box after a delay (retention interval) of 30 seconds and were reexposed to the illuminated sample and distractor keys for 1 minute. If a pigeon made more pecks to the sample during this interval, the distractor was extinguished and subsequent pecks to the sample were reinforced on the previous schedule for an additional 15 minutes. If, however, a pigeon made more pecks to the distractor, both keys were extinguished and the subject was returned to its home cage. For all subjects, matching-to-sample accuracy was higher in the first condition. In a second experiment, the retention interval was increased to 5, 15, and 30 minutes, and then to 1, 2, 4, 8, 12, and 24 hours. Most subjects remembered the correct key location for up to 4 hours, and in one case, up to 24 hours, demonstrating a spatial-memory proficiency far better than previously reported in this species on delayed matching tasks. The results are discussed in terms of the commonly held distinction between working and reference memory.     

Response-dependent prechoice effects on foraging-related choice

Three experiments explored the influence of prechoice events on pigeons' preference. In two of three studies, a fixed-interval 200-second prechoice period preceded the initial links of a concurrent chain in which outcomes differed either (a) in terms of the delay to food or (b) in terms of amount of food and delay to food. In Experiment 3, the prechoice period preceded the initial links that provided a choice between a small single food presentation and two identical, more delayed food presentations. In all three cases, obtained choice proportions did not vary as a function of prechoice duration. These results suggest that a local-contextual view adequately describes the foraging context; they also have implications for the appropriate formulation of the delay-reduction theory of conditioned reinforcement and rate-maximizing views of optimal foraging theory.     

联结竞争对听写困难儿童形音联结编码的影响

听写困难是一种发生率较高的儿童学习障碍现象。听写困难的认知机制,主要包括语音加工缺陷、字形表征缺陷以及形音联结编码缺陷。本研究通过两个实验,考察了整字语音竞争和部件语音竞争,对听写困难儿童形音联结编码的影响。结果发现,在不同条件下,听写困难儿童的形音联结水平都落后于正常儿童;整字语音竞争显著干扰了正常儿童的形音联结编码,但对听写困难儿童的影响并不明显;与之相反的是,部件语音竞争对听写困难儿童的干扰更为明显。研究结果支持听写困难儿童的形音联结编码缺陷理论。在此基础上,听写困难儿童的形音联结较少受到整字语音的竞争干扰,但更容易受到部件语音的竞争干扰,这可能是因为,他(她)们的整体字形加工或表征存在缺陷,导致原生字字形和语音信息难以被激活,以及合体字的部件信息得到更多的加工所致。     

Beginning readers activate semantics from sub-word orthography

Two experiments assessed whether 7-year-old children activate semantic information from sub-word orthography. Children made category decisions to visually-presented words, some of which contained an embedded word (e.g., hip in ship). In Experiment 1 children were slower and less accurate to classify words if they contained an embedded word related in meaning to the category (e.g., slower to reject ship as a ‘body part’ than an ‘animal’), especially when the embedded word was higher in frequency than the carrier word. This demonstrates that young children activate semantic information from sub-word orthographic representations, and that they do so from the relatively early stages of learning to read. Experiment 2 replicated this effect. Furthermore, we observed semantic interference regardless of whether the embedded word shared its pronunciation with the carrier (e.g., the hip in ship) or not (e.g., the crow in crown), and regardless of its position within the carrier, suggesting that interference was not dependent on phonological mediation. These findings show that by 7-years-of age, children have begun to establish an orthographic system that is capable of activating sub-word orthographic patterns, strong enough to connect with meaning, when reading words silently.