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71.
Roscoe A. Dykman Philip C. Loizou Peggy T. Ackerman Patrick H. Casey W. Brian McPherson 《Integrative psychological & behavioral science》2000,35(4):284-297
Sixty-five subjects, ages 8 to 12, participated in a visual electrophysiological study. Twenty-two of the subjects had received
a diagnosis of nonorganic failure-to-thrive (FTT) before the age of three. The remaining 43 subjects had no history of FTT
and served as Controls. IQs were obtained with the abbreviated WISC-III, and the Controls were split into two groups, LO IQ
and HI IQ, to provide a LO IQ Control group with an average IQ equivalent to the FTT group. Event-related brain potentials
(ERPs) were recorded from five scalp locations during a cued continuous performance task (CPT). Subjects had to press a button
every time they saw the letter “X” following the letter “A” (50 targets out of 400 stimuli).
During the CPT, the FTT subjects made marginally more errors of omission to targets than the LO IQ Control group and significantly
more errors of omission than the HI IQ Control subjects. The groups did not differ significantly on errors of commission (false
alarms) or reaction times to targets. ERP averages revealed a group difference in amplitude in a late slow wave for the 50
non-X stimuli (false targets) that followed the letter A. This difference was greatest over frontal sites, where the FTT group
had a more negative going slow wave than each control group. Late frontal negativity to No Go stimuli has been linked with
post-decisional processing, notably in young children. Thus, the FTT subjects may have less efficient inhibitory processes,
reflected by additional late frontal activation. *** DIRECT SUPPORT *** A31BB040 00006 相似文献
72.
Three hundred fifty-seven college students were surveyed to assess later adolescents' awareness of the status of nuclear arms development and possible effects of a nuclear war on people and the environment. Chi-square analyses were performed to determine whether the frequency of correct responses differed with regard to participants' sex, political orientation, and position toward the United States' possession of nuclear weapons. Results suggest that later adolescents are extremely uninformed regarding the current status of nuclear issues and the consequences of a nuclear war. These data, coupled with findings from previous studies reporting children's and adolescents' concerns and fears about nuclear war, indicate that there is a strong need to educate young people concerning nuclear issues. 相似文献
73.
Two hundred seventy-seven late adolescents were questioned regarding what they believed differentiated an intimate from a nonintimate relationship. Adolescents' responses supported Erickson's (1963) view of intimacy as being characterized by openness, sharing, and trust, with only minimal differences occurring between the sexes, and relative to current dating/relationship status. Their expressed views varied from Erickson's, however, as they included physical/sexual interaction as a critical component. An additional difference was the relatively few students who included self-abandonment and commitment as necessary elements of an intimate relationship. Explanations for these differences are presented. 相似文献
74.
Early adolescents' views concerning conventional war were assessed in order to better understand the thinking of today's youth, and to determine similarities and differences of the views expressed by adolescents 15 years ago. Three hundred sixty-two seventh-grade students were surveyed regarding conventional warfare in general and United States military involvement in Latin America specifically. Results suggest participants were somewhat more accepting of war in 1986, and that many were skeptical of President Reagan's honesty and wisdom on the issue of United States military involvement in Latin America. 相似文献
75.
Older adolescents were surveyed concerning three issues: behaviors which constitute infidelity in a dating relationship, reasons for a dating partner to be unfaithful, and reactions to a dating partner's infidelity. Responses from 247 participants indicated more similarities than differences between dating infidelity and extramarital affairs with regard to behaviors, causes, and consequences. Results are discussed in terms of similarities between dating and marital infidelity, and the rationale for professionals to interact with adolescents concerning the potential long-term consequences of dating infidelity. 相似文献
76.
Late adolescents' views concerning conventional war were assessed in order to better understand the thinking of today's youth and to compare their views with those of early adolescents previously reported in the literature. Three hundred ninety-nine college undergraduates from two universities were surveyed regarding conventional warfare in general and United States military involvement in Latin America specifically. Results suggest that attitudes toward war were related to sex, socioeconomic status, and political affiliation. Although two-thirds of the respondents believed wars were sometimes needed, there was little support for United States military involvement in Latin America and much skepticism of President Reagan's honesty on the issue. Overall, late adolescents' views were less positive and less extreme than were those of early adolescents. 相似文献
77.
Roscoe A. Dykman Peggy T. Ackerman D. Michael Oglesby 《Integrative psychological & behavioral science》1992,27(3):228-245
Beat-to-beat heart rate (HR) was analyzed for 9 contiguous seconds in a warned reaction time (RT) paradigm. Imperative stimuli were tones of three
intensity levels (55, 78, and 100 db); a visual warning signal occurred 5 sec before tone onset. Baseline and reward conditions
were run. Normal controls were contrasted with three Attention Deficit Disorder (ADD) subgroups: ADD-only, ADD with hyperactivity
(ADDH), ADD with hyperactivity and aggression (ADDHA). The ADD subgroups were predicted to show less deceleration in HR because
of their problem sustaining readiness to respond. Significant sex x group differences in HR levels and change scores were
found. Overall, girls had higher HR levels than boys and the ADD-only group (boys and girls) had lower HRs than the other
ADD groups. But, the ADD-only boys had more marked deceleration to the warning signal and acceleration to the tones than the
other ADD boys, whereas the ADD-only girls were no more reactive than the ADDH and ADDHA girls. Control girls had the highest
HR levels and were the most reactive to stimuli. Control boys and ADD-only boys had similar HR levels and reaction patterns.
ADD-only girls appear to be underaroused, whereas ADD-only boys do not. Results suggest that cardiac measures can provide
external validation of disruptive and nondisruptive ADD subtypes. 相似文献
78.
Roscoe A. Dykman Peggy T. Ackerman Joseph E. O. Newton 《Integrative psychological & behavioral science》1997,32(1):9-18
This article discusses past research bearing on the question of the etiology of Posttraumatic Stress Disorder (PTSD). It argues
that PTSD can be adequately accounted for by a process of emotional sensitization and that this is a more parsimonious explanation
than the two-factor learning theory of Mowrer, now postulated by several writers. In brief, the etiology and subsequent development
of PTSD is viewed as the result of the sensitization of fear/anxiety which is linked to a variety of to be conditional stimuli
by both backward and forward association: these become conditional stimuli (CSi) once paired with the instigating circumstances.
It is furthermore assumed that PTSD will not occur in the absence of a genetic susceptibility that may vary from zero to absolute
certainty. Thus far, our evidence is limited to a sensitivity to loud sounds, but it is highly probable that touch and other
sensory systems are involved (not necessarily in parallel). The fact that abuse often leads to behavioral disorders, including
sexually seductive behaviors in children sexually abused, requires a recognition that emotional reactions other than fear
may be sensitized. Fear in combination with pleasure or pleasure alone coupled with a loss of self-esteem may explain these
acting-out behaviors. 相似文献
79.
Joseph E. O. Newton Oddist D. Murphree Roscoe A. Dykman 《Integrative psychological & behavioral science》1970,5(2):75-89
Two behaviorally distinct strains of pointer dogs, one bred for nervousness (pronounced freezing behavior, withdrawal behavior), the other bred for normal behavior, exhibit prominent differences in their heart rates and incidence of sporadic occurrences of atrioventricular heart block. Of 67 nervous-line dogs, 70 per cent showed second degree AV-block on at least one occasion, and their heart rates averaged 65 beats/min. Only 15 per cent of 52 normal-line dogs displayed AV-block (generally fewer instances per dog) and their heart rates averaged 110 beats/min. Fifth generation nervous-line puppies, two to six weeks old, exhibited occasional AV-block even at heart rates averaging 183 beats/min. The incidence and “severity” increased as the puppies aged. Dogs crossbred from second and third generation parents of the two main lines show intermediate incidences of AV-block and intermediate heart rates. The incidence of AV-block is predominant in females. This is interpreted as a sex-influenced, agedependent, polygenic mode of inheritance. Humoral factors probably account for the sex-influence, and psychological stress probably also plays a role. No sex difference is noted in heart rates. 相似文献
80.
Rachel H. Thompson Brian A. Iwata Juliet Conners Eileen M. Roscoe 《Journal of applied behavior analysis》1999,32(3):317-328
A number of variables influence the effectiveness of punishment and may determine the extent to which less intrusive forms of punishment may be used as alternatives to more intrusive interventions. For example, it has been suggested that response suppression during punishment may be facilitated if reinforcement is concurrently available for an alternative response. However, results of basic research demonstrating this finding have not been replicated with interventions more commonly prescribed as treatments for problem behavior. We evaluated the effects of relatively benign punishment procedures (reprimands or brief manual restraint) on the self-injurious behavior of 4 individuals who had been diagnosed with mental retardation, when access to reinforcement for alternative behavior (manipulation of leisure materials) was and was not available. In all cases, punishment produced greater response suppression when reinforcement for an alternative response was available. 相似文献