Segmentation of speech in a foreign language

The subjects' ability to segment foreign speech was examined. Naturalness judgments regarding three syntactically defined pauses [between constituents (noun and verb phrases), words, or syllables] were obtained using a paired-presentation, forced-choice paradigm. It was hypothesized that segmentation skill developed through exposure to lexical and syntactic markers. Teh existence and effect of such markers was investigated by assigning subjects to various exposure conditions.Results indicated that lexical and syntactic markers exist and can be utilized by subjects in segmenting speech. Contrary to previous research, however, exposure did not facilitate performance. All groups discriminated constituents from either words or syllables, and words from syllables. Results were interpreted as reflecting the interdependence of syntax and suprasegmental phonology. Results challenged the credibility of traditional associationist accounts of language acquisition and speech perception. Results were discussed in the context of Martin's theory of the rhythmic structure of speech.     

Physicians' H]ead and Body Positions as Determinants of Perceived Rapport

The relationship between physicians' b]ody movement and judgments of rapport was examined in this study. One-hundred eighteen observers rated physicians' b]ehavior on 14 bipolar scales assessing dimensions of empathy. Physicians' n]onverbal behavior was manipulated so that there were three levels of trunk angle (forward, straight, backward), two levels of arm position (open, folded), two levels of leg position (open, crossed), and two levels of head attitude (nodding, not-nodding). Significant effects were found for trunk angle, head attitude, and arm posture; physicians who leaned forward with open arm positions and nodded their head were judged more positively. Discussion focuses on the reinforcing valuc of nodding, judges' p]erceptions of physicians' a]ccessibility conveyed by trunk and arm postures, and expressions of dominance in physician-patient encounters.     

Community Norms and Blood Donation1

It is suggested that for social psychological theory and research on helping to provide an adequate general explanation of helping, more attention must be paid to supraindividual factors. Most studies of blood donation have failed to take into account a number of factors that may influence donations at the level of the organization, community or collectivity. This study examines the possibility that specific community norms may emerge that have an influence on the donating behavior of community members. Perceived normative support was found to exist in different degrees in communities that provide different levels of behavioral support for bloodmobile visits, and persons who report a greater degree of perceived community support for donation are more likely to have donated in the past year. Implications for donor recruitment procedures are discussed.     

A procedural theory of eye movements in doing arithmetic

A procedural theory of eye movement that accounts for main features of the stochastic behavior of eye-fixation durations and direction of movement of saccades in the process of solving arithmetic exercises of addition and subtraction is presented. The best-fitting distribution of fixation durations with a relatively simple theoretical justification consists of a mixture of an exponential distribution and the convolution of two exponential distributions. The eye movements themselves were found to approximate a random walk that fits rather closely in both adult and juvenile subjects the motion postulated by the normative algorithm ordinarily taught in schools. Certain structural features of addition and subtraction exercises, such as the number of columns, the presence or absence of a carry or a borrow, are well known to affect their difficulty. In this study, regressions on such structural variables were found to account for only a relatively small part of the variation in eye-fixation durations.     

The inter-domain among personality and cognition variables in people who commit murder

The inter-domain among personality (MMPI) and cognition (intelligence) variables in a sample of 137 males charged with first degree or capital murder was examined through canonical analysis. Race was included as a control variable. Two significant canonical correlations were found which contribute to an understanding of the relationship between personality and cognition in violent people. These variates were identified as Problem-solving Focus and Introspective Self-focus. Results also suggest that these inter-domain variates explain the relationship between personality and cognition variables to a greater degree for black murderers than for white murderers.     

Analgesic and opioid involvement in the shock-elicited activity and escape deficits produced by inescapable shock

Three experiments examined the involvement of analgesic processes and endogenous opioids in the production of the shuttlebox escape acquisition and unconditioned activity deficits which follow exposure to inescapable shock. Experiment 1 found that the opiate antagonist naltrexone administered before the inescapable shock session interfered with the shuttlebox escape acquisition deficit which would normally follow. Experiment 2 found naltrexone to completely prevent the unconditioned activity deficit. The final experiment revealed that dexamethasone, a synthetic glucocorticoid which abolishes the analgesia produced by inescapable shock, reversed the activity deficit. These results indicate that endogenous opioids may be involved in the production of both the escape acquisition and activity deficits. They also suggest that the analgesia produced by these opioids may participate in the mediation of the activity deficit, even though analgesia is not involved in producing the shuttlebox acquisition deficit.     

Pavlovian processes do mediate control of the “advance” response strategy

Two parallel experiments used pigeons in a transfer of control design to determine the basis of the transfer of the use of the “advance strategy” across successive discriminations (W. K. Honig & H. Lindsay, Learning and Motivation, 1975, 6, 157–178). Pigeons were first trained under instrumental contingencies to use an “advance” response to maximize their exposure to S^D and minimize their exposure to S^Δ. Then orthogonal stimuli (key lights in Experiment 1 and diffuse illuminations in Experiment 2) were independently established through separate discriminative Pavlovian procedures as CS+ and CS? or as CS^o's. Later in special tests, it was demonstrated that the associative values of the Pavlovian CS's were a major factor governing the use of the advance strategy: only pigeons exposed to $\text{CS+}\text{CS?}$ used the advance response to regulate their exposure to either CS. Although these experiments showed that the necessary and sufficient conditions for utilization of the advance strategy are the Pavlovian associative values of the discriminative stimuli, opportunity for differential “operant” responding during the discriminative stimuli seems to be a contributor to the optimal use of the advance response across successive discriminations.     

Duration-reduction of avoidance sessions as negative reinforcement

Five rats were exposed to a shock-postponement procedure in which responses on each of two levers initially had equivalent effects. After an initial training sequence that ensured at least some responding on each lever, an additional consequence was made conjointly operative on the previously less-preferred lever for each animal. Each response on this lever continued to postpone shock, but also reduced the session duration by one minute. The conjoint contingencies were operative until, through session-shortening responses and the passage of time, the session was scheduled to end in two minutes; during the final two minutes the session-shortening contingency was disabled while the shock-postponement contingency continued to be operative on both levers. When responding shifted to a predominance on the session-shortening lever, the conjoint contingency was shifted to the other lever; for four of the five rats this reversal was followed by two additional reversals. Two of the rats' responding showed clear, strong, and unambiguous sensitivity to the session-shortening contingency. The responding of two others was also systematically controlled by that contingency, but the effects were less clearcut. The fifth animal showed an initial shift when session-shortening was introduced, but its subsequent behavior proved insensitive to reversals of procedure. The results clearly indicate a sensitivity of behavior to events on a time scale quite distinct from that of immediate consequences. They also support an interpretation of avoidance sessions, considered in their entirety, as events whose contingent relationship to behavior can affect that behavior—even in the absence of stimuli that delineate those relationships. Finally, these results support an interpretation of aversively based conditioning within a broader context, analogous to the “open versus closed economy” interpretation of appetitively controlled behavior.