Within-compound associations in a variety of compound conditioning procedures

Three experiments used a flavor-aversion preparation to demonstrate the occurrence of within-compound associations in various conditioning procedures. In Experiment 1 rats first received two separate two-flavor compounds, each followed by a mild US. They then received one element from one compound paired with a strong US and one element from the other compound nonreinforced. A subsequent choice test of the other two flavors from the compounds revealed that the consumption of each test flavor reflected the conditioning history of the element with which it had been paired. Rats drank less of the flavor whose associate had been paired with the strong US than of the flavor whose associate had been nonreinforced. In Experiment 2 within-compound associations were observed using a similar design in a blocking procedure in which one element from each of the two compounds was conditioned previously. Experiment 3 identified within-compound associations in a procedure where reinforced single element presentations were intermixed with nonreinforced compound presentations, as in a conditioned inhibition paradigm. These results suggest that within-compound associations occur in several important conditioning procedures which use multiple CS presentations.     

Semantic aphasia: A neglected entity

Three cases of semantic aphasia are reported. Computerized brain tomography showed bilateral temporo-parieto-occipital junction hemorrhages in one patient, and left parieto-occipital junction infarctions in the other two patients. The auditory comprehension defect of the three patients was characterized by preserved understanding of single words and impaired understanding of grammatically complex constructions. It is suggested that this comprehension defect reflects an inability to fully grasp the meaning of words and grammatical constructions imbued with spatial or quasi-spatial significance. Each of the three patients showed a complex spatial disorder that included constructional apraxia, spatial agnosia, and elements of Gerstmann's syndrome. The aphasic as well as the spatial disorder of semantic aphasics may be manifestations of a common defect in the perception of spatial relationships produced by left temporo-parieto-occipital region damage.     

Tracing memory-structure activation during person judgments

The purpose of the reported research was twofold: (a) to introduce a procedure for measuring concept activation during memory-based decisions and (b) to employ the procedure to investigate memory-activation processes in social judgments. Recent research has focused on subjects' reliance on memory for earlier inferred categorizations as the basis for judgments about persons. However, subjects have also been shown to rely on memory for factual information when making such decisions. To more fully understand how social judgments are made, methods are needed that are capable of tracing concept activation during the judgment process. The present study introduces a procedure that relies on probe recognition speed as a measure of concept activation. The procedure is used to examine alternative models of how subjects activate categorical and event memory when making contemplative impression judgments (i.e., judgments that they have to justify). The results favor a dependent memory-activation model that hypothesizes subjects activate both facts and earlier categorizations that they have made about a person when making subsequent memory-based judgments. Memory-structure activation was dependent in that facts relevant to forming the early categorizations were more likely to be activated in the service of a judgment than category-irrelevant facts. Advantages and limitations of the probe procedure as a measure of memory-structure activation during decisions are discussed.     

On the consequences of priming: Assimilation and contrast effects

Two experiments investigated the effects of priming (activation of a category by unobtrusive exposure to exemplars of that category) on subsequent judgments in an unrelated task. Subjects were primed with one of four levels of ferocity (size) in the course of a “color perception” experiment, and were later asked to judge the ferocity (size) of real (unambiguous) and unreal (ambiguous) animals. An interaction between ambiguity of judged stimuli (real vs unreal animals) and extremity of primed exemplars (moderate vs extreme levels of ferocity or size) was revealed. Assimilation effects (judgments consistent with the primed category) occurred only when moderate exemplars were primed and ambiguous stimuli judged. Contrast effects occurred when extreme exemplars were primed and ambiguous stimuli judged and, irrespective of extremity of the primed exemplar, when unambiguous stimuli were judged. The results are interpreted in terms of an integration of social judgment and social cognition perspectives.     

Investigative versus realistic Holland types and adjustment in theoretical engineering majors

This study tested the sensitivity of J. L. Holland's (Making vocational choices: A theory of careers, Englewood Cliffs, N.J.: Prentice-Hall, 1973) congruence method for predicting differential outcomes in the case of subtle person-environment congruence differences. This question is relevant to engineering programs, where students with adjacent Holland orientations of Investigative (I) and Realistic (R) aspire to complete theoretically oriented engineering majors, such as electrical and mechanical engineering. It was hypothesized that high congruence (e.g., I-type student in I-type engineering major) compared to moderately high congruence (e.g., R-type in I-type major) would result in more positive educational outcomes. A preliminary analysis verified that subgroups of I- and R-type students possessed similar scores on measures of general and math aptitude. Results on both outcome measures favored the high student-curriculum congruence hypothesis. I- compared to R-type subjects demonstrated greater persistence in their initial engineering major over a 2-year period and attained higher grades. Persistence findings replicated across two separate classes of entering students, but academic performance differences were not as consistent.     

Young children's storage behavior in a memory-for-location task

Two experiments concerned with children's intentional preparation for future retrieval in a memory-for-location task are presented. In the first experiment, 3-, 5-, 7-, and 9-year-olds were instructed to store and subsequently retrieve an object on a large spatial display. All age groups, except the 3-year-olds, tended to store the object at distinctive locations and their retrieval performance was facilitated accordingly. The four age groups did not differ in the types of selections made in a nonmemory control task. The second experiment dealt with the effects of feedback and informational factors on strategy acquisition. Preschoolers were given experience at retrieving the object from distinctive and nondistinctive positions on the stimulus display. Later, when instructed to store the object by themselves, older preschoolers produced the distinctive-position storage strategy following a feedback procedure in which they directly observed the consequences of their retrieval selections. The strategy was adopted by younger preschoolers, but only when additional strategy and task information accompanied visual feedback. The use of external memory tasks with young children and factors affecting strategy acquisition and utilization are discussed.     

A study of spelling in aphasia

To secure systematic information on spelling abilities following damage to the dominant hemisphere, a test probing performance in three modalities of response was administered to a group of aphasic patients. Except for a predictable deficit among anterior aphasics in oral spelling, anterior and posterior aphasics exhibited comparable performances on the measures of spelling. However, anterior and posterior aphasics differed from one another on the kinds of words they most accurately spelled, the errors they were prone to make, and certain strategies which they characteristically adopted. These results suggest two alternative approaches to spelling: one approach, common in posterior aphasics, entails choosing letter combinations on the basis of their customary sounds; a second approach, common among anterior aphasics, appears to rely on a partially preserved image of the word's appearance.     

A Response to G. Scott Davis

This defense of my essay on Vitoria and Suárez argues that my use of the term “religious war” is based on religious authority at least as much as religious cause, and that Davis’s decision to discuss only Vitoria limits his ability to come to terms with my thesis. To Davis’s argument that for Vitoria war was justified against the Indians only as a necessity of simple justice and to protect the innocent, I argue that his disjunction between simple justice and religious cause is a false one that fails to come to term with the church’s primary reason for approaching Indians, with the Thomistic understanding of the relation between nature and grace and between reason and revelation, and with the distinction between what justice requires in relation to the church and Christians and what it requires for others. I explain finally that my claim is not that the Catholic political rulers readily responded to papal calls for war except when it was in their interest, but that papal war was central to the normative just‐war tradition of the church in canon law and among major theologians like Vitoria and Suárez.     

The pop out of scene-relative object movement against retinal motion due to self-movement

An object that moves is spotted almost effortlessly; it "pops out". When the observer is stationary, a moving object is uniquely identified by retinal motion. This is not so when the observer is also moving; as the eye travels through space all scene objects change position relative to the eye producing a complicated field of retinal motion. Without the unique identifier of retinal motion an object moving relative to the scene should be difficult to locate. Using a search task, we investigated this proposition. Computer-rendered objects were moved and transformed in a manner consistent with movement of the observer. Despite the complex pattern of retinal motion, objects moving relative to the scene were found to pop out. We suggest the brain uses its sensitivity to optic flow to "stabilise" the scene, allowing the scene-relative movement of an object to be identified.     

功能性消化不良

功能性消化不良（FD）是临床上常见的症候群,其发病机制可能与胃及十二指肠的高敏感、胃肠运动障碍、幽门螺杆菌（H．pylori）感染、精神心理因素等有关。症状为反复发作的上腹部不适、疼痛、早饱、腹胀等。目前FD的诊断以罗马Ⅲ为标准,即无可以解释症状的器质性疾病的证据（包括内镜）,诊断前症状至少出现6个月,近3个月症状符合以下1点或1点以上：餐后饱胀不适、早饱、上腹痛、上腹烧灼感。治疗以去除诱因及对症治疗为主,包括避免劳累及精神紧张,应用抑酸药、促胃肠动力药、根除H．pylori、西甲硅油乳剂、抗抑郁及中药等。