Generalization gradients following training on a symbolic matching-to-sample task

The major finding in the present experiment was that line orientation controlled pigeons’ responding after training on a one-key symbolic matching-to-sample task. When the vertical line appeared as the sample, testing along the line dimension produced incremental and decremental generalization gradients, depending on the color of the comparison. Conversely, when the vertical line served as the comparison, incremental and decremental gradients also emerged, but here the type of gradient depended on the color of the sample. Thus, both the color of the sample (comparison) and line orientation exerted control of behavior.     

Human nonverbal discrimination of relative and absolute number

The nonverbal discrimination of relative and absolute number of sequential visual stimuli was investigated with humans in bisection, reproduction, and report tasks. Participants viewed a sequence of 40 red and black objects on each trial, randomly intermixed, and had to identify the number of red objects, which varied from 1 to 20. To prevent the use of a verbal-counting strategy, participants were required to name the objects as they appeared. The characteristics of human performance resembled those of pigeons in analogous procedures (Tan & Grace Learning and Behavior 38:408-417, 2010; Tan, Grace, Holland, & McLean Journal of Experimental Psychology 33:409-427, 2007): Average response number increased systematically with sample number, and bisection points were located at the arithmetic, not the geometric, mean. Additionally, in both the reproduction and report tasks, coefficients of variation decreased for values less than 6 but increased or remained constant for larger values, suggesting that different representations were used for small and large numbers.     

阅读策略培训对学生阅读理解能力影响的元分析

国内外有关阅读策略培训对学生阅读理解能力影响的研究众多,但研究结果不尽相同。本研究以Comprehensive Meta-analysis V2软件为工具对国内外27项此类研究进行了元分析。研究结果如下:1)阅读策略培训对学生阅读理解能力影响的总效应值为0.816,达到大效应值;2)可能存在多种因素共同作用影响阅读策略培训对学生阅读理解能力影响的效果;3)语言环境和培训的策略类别对研究结果无显著影响,而实验周期和阅读理解能力测试方式对研究结果具有显著影响。     

Transposition in pigeons: reassessing spence (1937) with multiple discrimination training

We studied transposition in pigeons, using multiple-pair discrimination training. Four birds discriminated two pairs of circles: 1+ 2− and 5+ 6− or 1− 2+ and 5− 6+ (digits denote circle diameters and plus and minus signs denote reward and nonreward, respectively). Four other birds discriminated four pairs of circles: 1+2−, 1+3−, 4+6−, and 5+6−or 1−2+, 1−3+, 4−6+, and 5−6+. Finally, 4 birds discriminated only one pair of circles: 1+ 2−, 1+ 2−, 5+ 6−, or 5− 6+. Testing included five new pairs—1/5, 2/3, 2/6, 3/4, and 4/5—that distinguished absolute from relational accounts of transposition. The pigeons’ relational responding rose from one- to two- to four-pair training. The similarity of the testing stimuli to one another also affected relational responding: Transposition increased with highly dissimilar stimuli. Neither Spence’s (1937) theory nor existing relational accounts could predict the obtained pattern of relational responding.     

The effect of discrimination training on the response rate and response duration of the rat

Response rate (responses per minute) and response duration (time in seconds per press) were recorded in rats shifted from multiple variable-interval variable-interval (mult VI VI) to multiple extinction variable-interval (mult EXT VI). This procedure produced positive contrast (i.e., a decrease in response rate in EXT and an increase in VI) in 11 of 12 rats and, in addition, produced an increase in response duration (i.e., bar holding), which, for the most part, was confined to the EXT component of the mult EXT VI condition. One of the 12 rats showed negative induction (i.e., a decrease in response rate in both the EXT and VI components), and also an increase in response duration in both the EXT and VI components of the mult EXT VI condition. The results indicate that generalization of behavior from the EXT to the VI component can produce negative induction, and that such generalization must be prevented if positive contrast is to occur in the rat.     

Enhanced facial discrimination: effects of experience with American sign language

On-line comprehension of American Sign Language (ASL) requires rapid discrimination of linguistic facial expressions. We hypothesized that ASL signers' experience discriminating linguistic facial expressions might lead to enhanced performance for discriminating among different faces. Five experiments are reported that investigate signers' and non-signers' ability to discriminate human faces photographed under different conditions of orientation and lighting (the Benton Test of Facial Recognition). The results showed that deaf signers performed significantly better than hearing non-signers. Hearing native signers (born to deaf parents) also performed better than hearing nonsigners, suggesting that the enhanced performance of deaf signers is linked to experience with ASL rather than to auditory deprivation. Deaf signers who acquired ASL in early adulthood did not differ from native signers, which suggests that there is no 'critical period' during which signers must be exposed to ASL in order to exhibit enhanced face discrimination abilities. When the faces were inverted, signing and nonsigning groups did not differ in performance. This pattern of results suggests that experience with sign language affects mechanisms specific to face processing and does not produce a general enhancement of visual discrimination. Finally, a similar pattern of results was found with signing and nonsigning children, 6-9 years old. Overall, the results suggest that the brain mechanisms responsible for face processing are somewhat plastic and can be affected by experience. We discuss implications of these results for the relation between language and cognition.     

Developing Human Capital: training and mentoring for principals

The links between educational development and economic capability are widely recognised and have provided part of the rationale for the shift to market concepts of education in many countries. As more functions have been devolved to school level, it has become increasingly evident that principals require training and development to carry out their new responsibilities and to lead improvement in their schools. In Singapore, aspiring principals take a 1‐year training course which includes mentoring by an established principal. In England and Wales, the new National Professional Qualification for Headship is undertaken on a part‐time basis and adopts a quasi competence model without a mentoring dimension. This article compares the two approaches and concludes that training is likely to be more effective if mentoring is a central component of the process.     

The effects of team training on team outcomes: A meta‐analysis

A meta‐analysis was conducted to determine relationships between team training and team effectiveness. Results from the 21 studies provided evidence that training is positively related to team effectiveness and effectiveness in five outcome categories: affective, cognitive, subjective task‐based skill, objective task‐based skill, and teamwork skill.     

The effects of intertrial and feature-target intervals on operant serial feature-positive discrimination learning

The effects of intertrial interval (ITI) and feature-target interval (FTI) on the nature of learning in discrete-trial operant serial feature-positive (feature → target+ / target?) discrimination training were examined in two experiments with rats. Discrimination performance was acquired more rapidly with longer ITIs and shorter FTIs. In contrast, transfer to a separately trained target was greater with shorter ITIs regardless of FTI. Persistence of discrimination performance after feature extinction was greater with longer ITIs. Only the last of these performance measures showed evidence for invariance with constant ITI/FTI ratios. The results are discussed in the context of theories of occasion setting.     

Inhibitory effects of omission training

In Experiment 1, pigeons were trained to peck red or blue keys for food reinforcement at variable intervals, while food was contingent on withholding key pecks in the presence of a vertical line (omission training). When the line was briefly superimposed on red or blue in a compound test, responding was reduced. When the orientation of the line was varied during extinction, generalization gradients were variable but often had most responding at or near vertical. In Experiment 2, pigeons were trained in a discrete trials procedure that made food contingent upon pecking in the presence of triangle, and upon the absence of pecking in the presence of red (omission training). Food was never given on green-key trials (extinction). When red or green backgrounds were presented with the triangle in a compound test, responding was reduced similarly in the presence of both key colors. Subsequent resistance to auto-shaping was also similar for red and green. These data, taken together with reports in the literature, suggest that the inhibitory effects of omission training are quite similar to those of extinction. Thus, the crucial condition for obtaining inhibitory effects is not a negative stimulus-reinforcer correlation, as in extinction, but simply the establishment of low rates of responding to the inhibitory stimulus.     

The Impact of Self-assessment on Achievement: The effects of self-assessment training on performance in external examinations

Can the quality of students' work be improved through training in self- assessment practices? This paper considers the impact of training high school students on their performance in external examinations. Teachers were selected from a sample of high schools and trained in how to develop students' self-assessment skills. Ten high schools representative of the top, middle and bottom levels of academic achievement in national examinations were chosen and students trained in self-assessment by their normal class teachers as part of their final year curriculum. An experimental group comprising 256 participants received formal training in self-assessment skills for the entire three terms of the academic year. A control group was selected from matched classes not receiving such training. A significant difference favouring those trained in self-assessment was found overall and in each curriculum area. While it is demonstrated that self-assessment training can have an impact on student performance the paper considers the circumstances of the study and whether similar outcomes might be possible in less favourable conditions.     

Interocular transfer in pigeons of color discrimination but not motor response training

Adult pigeons with one eye covered were trained to peck a response key using grain as a reinforcer. In subsequent tests, with the trained eye covered and the control eye open, the birds failed to peck the key. The subjects were then divided into two groups for a second experiment. The first group was trained on a single-key, peck/no-peck color discrimination task with the original control eye covered. When tested for interocular transfer of discrimination performance, these birds failed to respond at all. They were then trained to peck a blank response key with the training eye covered and the control eye open. Control-eye tests after this motor response training resulted in excellent transfer of color discrimination performance. The second group of subjects was trained to peck a blank key with first one eye covered and then the other, before monocular discrimination training was begun. These birds showed excellent transfer of discrimination performance during control-eye tests. These results show that, at least in the operant paradigm, motor response training does not transfer interocularly and this lack of transfer may interfere with transfer of discrimination performance.     

勤工助学对大学生就业与创业能力培养作用的研究

从目前大学生就业困难的自身原因分析为入手点,结合大学生勤工助学现状,对大学生的勤工助学问题进行调查问卷并统计分析,针对分析结果,探讨如何充分发挥勤工助学对大学生就业与创业能力培养作用提供创新思路。     

The effects of reinforcement and strategy training on impulsive responding.

Impulsive second-grade children received strategy training or strategy training combined with primary or secondary reinforcement. All training groups showed significantly longer response latencies and significantly fewer errors on the Matching Familiar Figures test immediately following training. The reinforcement groups had significantly longer latencies than the training-only group, and there was some indication that primary reinforcement was more effective than secondary reinforcement in producing response delay. The 3 training groups did not differ significantly on error scores.