Evaluating interobserver reliability of interval data

Previous recommendations to employ occurrence, nonoccurrence, and overall estimates of interobserver reliability for interval data are reviewed. A rationale for comparing obtained reliability to reliability that would result from a random-chance model is explained. Formulae and graphic functions are presented to allow for the determination of chance agreement for each of the three indices, given any obtained per cent of intervals in which a response is recorded to occur. All indices are interpretable throughout the range of possible obtained values for the per cent of intervals in which a response is recorded. The level of chance agreement simply changes with changing values. Statistical procedures that could be used to determine whether obtained reliability is significantly superior to chance reliability are reviewed. These procedures are rejected because they yield significance levels that are partly a function of sample sizes and because there are no general rules to govern acceptable significance levels depending on the sizes of samples employed.     

PHILIP LEVY AND THE G INDEX — A FINAL REPLY

Levy's argument using double extended matrices is shown to be without basis. Such a technique, it is pointed out, cannot properly be used in R technique to eliminate factors of means since it represents the double scoring of items—not persons, as would be required in his illustration.     

Classical heart-rate conditioning in the rat: The influence of curare and various setting operations

Conflicting reports concerning the success of classical conditioning of heart rate (HR) in curarized animals led to an experiment using a transfer design in which rats were classically conditioned either under curarized or restrained conditions. These conditions were then reversed for each group, giving a Curarized-Restrained (C-R) and a Restrained-Curarized (R-C) group. Results indicated that curare inhibits the conditional and unconditional HR response both during initial acquisition and after asymptotic levels of a HR CR have been attained. In addition, the C-R group did not acquire a CR during their later non-curarized restrained conditioning sessions, implying an inhibitory transfer from their earlier conditioning under curare. The UCRs during this period were normal for restrained rats. Analogous experimental“setting operations” prior to restrained conditioning were then explored by a second experiment which attempted to replicate the inhibitory transfer effect. The experimental operations investigated included: (1) restrained conditioning to investigate conditioned inhibition possibilities; (2) pseudo-conditioning types of randomized CS and UCS non-paired presentations to investigate associative vs. non-associative explanations; (3) CS-Only presentations to investigate possibilities that curare creates a blockage to the UCS, thus creating an inhibiting habituation to the CS; and (4) a group receiving curarization sessions, but no conditioning, to test the drug-only transfer effects. Results from the first and second experiments together indicated no inhibitory transfer effects under any prior experimental conditions except for those animals receiving classical conditioning while curarized. Only the CS-O group demonstrated any other kind of significant transfer effect; in this case a positive transfer accelerating later conditioning due to prior CS habituation sessions. These findings were discussed within the context of existing reports of curarized conditioning and setting operation effects on later conditioning, and various potential explanations and interpretations were explored.     

GAMES AND SPORTS : MISSING ITEMS IN CROSS-CULTURAL PSYCHOLOGY

Assez curieusement, le jeu et le sport ont été grandement négligés en tant que variables dans les recherches de psychologie interculturelle. Cette lacune surprend car le jeu et le sport sont intimement imbriqués dans la structure fondamentale de la culture et se manifestent sous la forme de comportements universels, spontanés, aisément observables et utilisables. Dans le but de réparer cette omission et de rejoindre les efforts des anthropologues et des sociologues, les auteurs suggèrent différents moyens d'utiliser le jeu et le sport dans la recherche interculturelle et plus spécialement dans quatre domaines : (1) étude de la perception et des processus cognitifs; (2) étude des changements sociaux; (3) théorie des jeux; (4) examen des aptitudes.     

THE APPLICATION OF THE HARRIS BRIDGE IN THE GENERALIZATION OF THE BURT RECIPROCITY PRINCIPLE-A DEMONSTRATION STUDY

The reciprocity principle, formulated by Burt, has related the Q and R factor systems when double-centered score matrices are used. Subsequently, Burt's bridge was first generalized by Sandler for single-centered matrices, but was applicable only under restricted conditions. The present paper describes a final generalization, a transition based on correlations rather than G indices, providing for the conversion of rotated Q factors to equivalent R factors. An illustrative example is given, using hypothetical data.     

When feeling poorly at work does not mean acting poorly at work: The moderating role of work-related emotional intelligence

It is important, both theoretically and for applied reasons, to understand who is likely to engage in counterproductive work behaviors. It is known that such behaviors are more likely to be exhibited by unhappy employees (i.e., those high in job negative affect), but this should be particularly true for individuals low in work-related emotional intelligence. The current study (N = 91) examined moderation-related hypotheses of this type in relation to five counterproductive work behaviors—abuse, sabotage, theft, withdrawal, and production deviance—among a sample of employees working at least 20 h per week. These behaviors varied positively by job negative affect and negatively by work-related emotional intelligence. In addition, the two predictors interacted for all five outcomes such that the highest levels of counterproductive work behavior were observed among employees who were high in job negative affect and low in emotional intelligence. The discussion focuses on implications for understanding counterproductive work behaviors and on the value of assessing work-related emotional intelligence as an ability that differs by employees.     

Lana Chimpanzee Learns to Count by “Numath”: A Summary of a Videotaped Experimental Report

This paper summarizes a videotaped presentation (Rumbaugh, Savage-Rumbaugh, Hopkins, Washburn, & Runfeldt, 1987) of computerized training programs whereby an adult female chimpanzee, Lana (Pan troglodytes), learned to use a joystick to remove from a screen the number of boxes appropriate to the value of a randomly selected Arabic numeral 1, 2, or 3. Initial training provided a variety of cues, both numeric and otherwise, to support correct performance. Across software programs, all cues other than numeric ones were deleted. In the final test, Lana was correct on over 80% of trials in which there was no residual feedback of intratrial events and where only her memory of those events could provide the cue to indicate that she had removed boxes in accordance with the value of the target numbers and should terminate the trial. The tape is narrated and consists of video recordings of Lana's performance on each software program.     

Lateral bias in infant chimpanzees (Pan troglodytes)

This study documents the presence, strength, and direction of lateralization in chimpanzees (Pan troglodytes) over the first 3 months of life. Nursery-reared chimpanzees (7 males and 5 females) were repeatedly assessed on a behavioral scale. Lateral bias was measured for 4 behaviors: hand-to-mouth, hand-to-hand, defensive grasp, and first step. Hand-to-mouth was significantly lateralized for the sample. Eight of the 10 chimpanzees that showed hand-to-mouth used the right hand. Lateral bias for defensive grasp was positively related to lateral bias both of first step and of hand-to-mouth. Lateral bias in hand-to-mouth was inversely related to lateral bias in hand-to-hand. Strength of lateralization increased as chimpanzees matured. These laterality effects in infant chimpanzees were expressed under conditions of emotional arousal. Moreover, degree of laterality may be a predictor of responsivity to stress.     

Psychological reactivity to discrepant events: Support for the curvilinear hypothesis

80 male and 60 female infants were observed under 5 a priori judged levels of discrepancy to assess whether sustained attention was linearly or curvilinearly related to degree of discrepancy from an experimental standard. Following habituation, $\text{7}\text{1}\text{2}$-month-old infants were exposed to either the repetition of the standard, a minimal, first- or second-level moderate discrepancy, or a novel stimulus having no relation to the standard. The related stimuli, varying in elongation, were sphere, pear, club, and cylinder-shaped objects; the novel stimulus was a different colored, tooth-like object. 80 infants observed the sphere as the standard and the cylinder as the second-level moderate discrepancy; 60 infants were exposed to the reverse order with the cylinder as the standard. The use of different stimuli at each discrepancy level controlled for specific stimulus effects. Habituation and recovery of responding were observed in an operant paradigm. Lever pressing, fixation, and vocalization increased most to the second-level moderate stimuli and decreased most to the familiar and novel objects; fretting was highest to the redundant stimuli and lowest to the moderate objects. There were no stimulus main effects or interactions. The results support the hypothesis of a curvilinear relation between stimulus discrepancy and sustained attention, excitement, and preference.