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Author Vallortigara G.
Title Minds of Their Own Type Journal Article
Year (up) 1998 Publication Trends in Cognitive Sciences Abbreviated Journal Trends. Cognit. Sci.
Volume 2 Issue Pages 118-118
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Call Number refbase @ user @ Serial 3466
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Author Byrne, T.; Sutphin, G.; Poling, A.
Title Acquisition, extinction, and reacquisition of responding with delayed and immediate reinforcement Type Journal Article
Year (up) 1998 Publication Behavioural Processes Abbreviated Journal Behav. Process.
Volume 43 Issue 1 Pages 97-101
Keywords Acquisition; Delayed reinforcement; Extinction; Rats
Abstract The present study investigated acquisition, extinction, and reacquisition of free-operant responding when rats' lever presses produced water after a resetting delay of 0, 10, 20, or 30 s. Results indicated that: (1) responding was acquired rapidly at all delays without shaping or autoshaping; (2) resistance to extinction was directly related to delay length and inversely related to intermittency of reinforcement; (3) responding acquired with delayed reinforcement recovered less rapidly from extinction, and was less efficient, than responding acquired with immediate reinforcement. Comparing these results with those of studies using discrete-trials and free-operant procedures with no reinforcement delay suggest that the specific conditions under which behavior is maintained determines, in part, the behavioral effects of delay and intermittency of reinforcement.
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Call Number Equine Behaviour @ team @ Serial 3601
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Author Carpenter, M.; Nagell, K.; Tomasello, M.; Butterworth, G.; Moore, C.
Title Social Cognition, Joint Attention, and Communicative Competence from 9 to 15 Months of Age Type Journal Article
Year (up) 1998 Publication Monographs of the Society for Research in Child Development Abbreviated Journal Monogr Soc Res Child Dev
Volume 63 Issue 4 Pages 1-174
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Abstract At around 1 year of age, human infants display a number of new behaviors that seem to indicate a newly emerging understanding of other persons as intentional beings whose attention to outside objects may be shared, followed into, and directed in various ways. These behaviors have mostly been studied separately. In the current study, we investigated the most important of these behaviors together as they emerged in a single group of 24 infants between 9 and 15 months of age. At each of seven monthly visits, we measured joint attentional engagement, gaze and point following, imitation of two different kinds of actions on objects, imperative and declarative gestures, and comprehension and production of language. We also measured several nonsocial-cognitive skills as a point of comparison. We report two studies. The focus of the first study was the initial emergence of infants' social-cognitive skills and how these skills are related to one another developmentally. We found a reliable pattern of emergence: Infants progressed from sharing to following to directing others' attention and behavior. The nonsocial skills did not emerge predictably in this developmental sequence. Furthermore, correlational analyses showed that the ages of emergence of all pairs of the social-cognitive skills or their components were interrelated. The focus of the second study was the social interaction of infants and their mothers, especially with regard to their skills of joint attentional engagement (including mothers' use of language to follow into or direct infants' attention) and how these skills related to infants' early communicative competence. Our measures of communicative competence included not only language production, as in previous studies, but also language comprehension and gesture production. It was found that two measures-the amount of time infants spent in joint engagement with their mothers and the degree to which mothers used language that followed into their infant's focus of attention-predicted infants' earliest skills of gestural and linguistic communication. Results of the two studies are discussed in terms of their implications for theories of social-cognitive development, for theories of language development, and for theories of the process by means of which human children become fully participating members of the cultural activities and processes into which they are born.
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Call Number refbase @ user @ Serial 3997
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Author Yulk G.
Title Leadership in organizations. Type Book Whole
Year (up) 1998 Publication Abbreviated Journal
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Abstract Yulk G. 1998. Leadership in organizations. Englewood Cliffs, NJ: Prentice-Hall

Leadership in Organizations focuses on effective leadership in organizations through both theory and practice. This book explains and critiques the major theories and studies that are most relevant and informative and reviews what we know about leadership effectiveness. This combination of theory and practice makes this text a useful resource for practicing managers who are looking for something more than superficial answers to difficult questions about leadership.
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Publisher Prentice-Hall Place of Publication Englewood Cliffs, NJ Editor
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ISSN ISBN 978-0138142681 Medium
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Call Number Equine Behaviour @ team @ Serial 4806
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Author Peters, G.; Tembrock, G.
Title Subharmonics, biphonation, and deterministic chaos in mammal vocalizations Type Journal Article
Year (up) 1998 Publication Bioacoustics Abbreviated Journal
Volume 9 Issue Pages
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Call Number Equine Behaviour @ team @ Peters1998 Serial 6483
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Author Sovrano, V.A.; Rainoldi, C.; Bisazza, A.; Vallortigara, G.
Title Roots of brain specializations: preferential left-eye use during mirror-image inspection in six species of teleost fish Type Journal Article
Year (up) 1999 Publication Behavioural Brain Research Abbreviated Journal Behav. Brain. Res.
Volume 106 Issue 1-2 Pages 175-180
Keywords Predator fixation; Fish; Left-eye preference
Abstract It has recently been reported that predator inspection is more likely to occur when a companion (i.e. the mirror image of the test animal) is visible on the left rather than on the right side of mosquitofish Gambusia holbrooki. This very unexpected outcome could be consistent with the hypothesis of a preferential use of the right eye during sustained fixation of a predator as well as of a preferential use of the left eye during fixation of conspecifics. We measured the time spent in monocular viewing during inspection of their own mirror images in females of six species of fish, belonging to different families--G. holbrooki, Xenotoca eiseni, Phoxinus phoxinus, Pterophyllum scalare, Xenopoecilus sarasinorum, and Trichogaster trichopterus. Results revealed a consistent left-eye preference during sustained fixation in all of the five species. Males of G. holbrooki, which do not normally show any social behaviour, did not exhibit any eye preferences during mirror-image inspection. We found, however, that they could be induced to manifest a left-eye preference, likewise females, if tested soon after capture, when some affiliative tendencies can be observed. These findings add to current evidence in a variety of vertebrate species for preferential involvement of structures located in the right side of the brain in response to the viewing of conspecifics.
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Call Number refbase @ user @ Serial 614
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Author Bonabeau, E.; Theraulaz, G.; Deneubourg, J-L.
Title Dominance orders in animal societies: the selforganization Type Journal Article
Year (up) 1999 Publication Bulletin of Mathematical Biology Abbreviated Journal Bull Math Biol
Volume 61 Issue 4 Pages 727-757
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Abstract In previous papers (Theraulaz et al. 1995, Bonabeau et al. 1996) we suggested, following Hogeweg and Hesper (1983, 1985), that the formation of dominance orders in animal societies could result from a selforganizing process involving a double reinforcement mechanism: winners reinforce their probability of winning and losers reinforce their probability of losing. This assumption, and subsequent models, were based on empirical data on primitively eusocial wasps (Polistes dominulus). By...
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Call Number Equine Behaviour @ team @ Serial 2172
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Author White, D.J.; Galef Jr, B.G.
Title Mate choice copying and conspecific cueing in Japanese quail,Coturnix coturnix japonica Type Journal Article
Year (up) 1999 Publication Animal Behaviour. Abbreviated Journal Anim. Behav.
Volume 57 Issue 2 Pages 465-473
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Call Number Serial 1811
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Author Giraldeau, L.A.; Beauchamp, G.
Title Food exploitation: searching for the optimal joining policy Type Journal Article
Year (up) 1999 Publication Abbreviated Journal Trends In Ecology And Evolution
Volume 14 Issue 3 Pages 102-106
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Abstract Commonly invoked foraging advantages of group membership include increased mean food intake rates and/or reduced variance in foraging success. These foraging advantages rely on the occurrence of 'joining': feeding from food discovered or captured by others. Joining occurs in most social species but the assumptions underlying its analysis have been clarified only recently, giving rise to two classes of model: information-sharing and producer-scrounger models. Recent experimental evidence suggests that joining in ground-feeding birds might be best analysed as a producer-scrounger game, with some intriguing consequences for the spatial distribution of foragers and patch exploitation.
Address Dept of Biology, Concordia University, 1455 Ouest Blvd de Maisonneuve, Montreal, Quebec, Canada H3G 1M8
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ISSN 0169-5347 ISBN Medium
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Notes PMID:10322509 Approved no
Call Number Serial 2137
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Author Boysen, S.T.; Himes, G.T.
Title Current Issues And Emerging Theories In Animal Cognition Type Journal Article
Year (up) 1999 Publication Annual Review of Psychology Abbreviated Journal
Volume 50 Issue 1 Pages 683-705
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Abstract Comparative cognition is an emerging interdisciplinary field with contributions from comparative psychology, cognitive/experimental and developmental psychology, animal learning, and ethology, and is poised to move toward greater understanding of animal and human information-processing, reasoning, memory, and the phylogenetic emergence of mind. This chapter highlights some current issues and discusses four areas within comparative cognition that are yielding new approaches and hypotheses for studying basic conceptual capacities in nonhuman species. These include studies of imitation, tool use, mirror self-recognition, and the potential for attribution of mental states by nonhuman animals. Though a very old question in psychology, the study of imitation continues to provide new avenues for examining the complex relationships among and between the levels of imitative behaviors exhibited by many species. Similarly, recent work in animal tool use, mirror self-recognition (with all its contentious issues), and recent attempts to empirically study the potential for attributional capacities in nonhumans, all continue to provide fresh insights and novel paradigms for addressing the defining characteristics of these complex phenomena.
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Call Number Equine Behaviour @ team @ Boysen1999 Serial 2973
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