Numerosity as a cue for successive reversal by rats and pigeons. by Robert Allen Fox

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Paginationvii, 78 l.
Number of Pages78
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Open LibraryOL16758401M

Download Numerosity as a cue for successive reversal by rats and pigeons.

This study tested a model of how animals discriminate the relative numerosity of stimuli in successive or sequential presentation tasks.

In a discrete-trials procedure, pigeons were shown one. Scalar effects in the visual discrimination of numerosity by pigeons. June ; that has been used extensively with rats and pigeons (e or space occupied by the stimuli as cues. However. with different cues (AX, BX). The trials are arranged so that the correlation of cues A and B with the outcome is either perfect (e.g., AX+/BX-) or imperfect (AX+/AX-/BX+/ BX-), while the relationship of X with the outcome is the same in each condition.

The animals are subsequently tested with X. Cue X elicits greater conditioned responding in. Also, pigeons can make relative numerosity judgments even when the arrays consist of entirely novel numbers of dots, as Emmerton et al.

() showed in the study of serial ordering effects. In that case, the birds had no opportunity to learn about the patterns that 3, 4 or 5 dots can form. After responding to each element in varying, successive numerosity displays, pigeons (Columba livia) had to choose, out of an array of symbols, the symbol designated to correspond to the preceding.

One potential cue that might be particularly salient in the present study is control by stimulus change. In the present study (as well as Bruce et al.,and Prichard et al., ), the sample. Homing pigeons are able to use time as a discriminative cue, either at short intervals (i.e., seconds, minutes) or long intervals (i.e., hours, days) in operant chambers (Wilkie & Willson Across three experiments, we examined the cuing properties of metric (distance and direction) and nonmetric (lighting) cues in different tasks.

In Experiment 1, rats were trained on a response problem in a T-maze, followed by four reversals. Rats that experienced a change in maze orientation (Direction group) or a change in the length of the start arm (Distance group) across reversals showed.

Counting in rats: Its functional significance and the independent cognitive processes that constitute it. J Exp Psychol Anim Behav Proc. ; – Pepperberg IM. Numerical competence in an African Grey parrot (Psittacus erithacus) J Comp Psychol.

; – Roberts WA, Coughlin R, Roberts S. Pigeons flexibly time or count on cue. A rat is trained to press a lever for a small amount of food. While pressing the lever at a steady rate, the rat is presented with a tone stimulus that had been previously paired with foot-shock.

When the tone stimulus is presented by itself, the rat decreases its rate of lever pressing. This decrease is an example of. Rats appear to time and sum the duration of successive events rather than use an event switch to “count” them.

A number of previous studies have also noted the importance of temporal cues in the discrimination of event sequences (Breukelaar and Dalrymple-Alford,Davis,Davis and Memmott,Fetterman,Santi and Van.

Ginsburg () found pigeons made Numerosity as a cue for successive reversal by rats and pigeons. book nificantly fewer errors on 0ddit.y than on similarity. He suggests that his use of observing response and correction techniques, avoided here, could differentially facilit,ate oddity compared to similarity.

Wodinsky and Bitterman ()) in a st,udy with the rat. A rat is placed in a straight-alley runway and learns to rapidly traverse the alley to obtain a food reinforcer. This task a.

uses a discrete trials procedure. uses a free-operant procedure. does not involve operant conditioning because the rat does not have to do anything to obtain the reinforcer. can be used to study the rate of. Unit 2 RATs study guide by morgan_bowley includes 22 questions covering vocabulary, terms and more.

Quizlet flashcards, activities and games help you improve your grades. Hantavirus Pulmonary Syndrome. The deer mouse (Peromyscus maniculatus), cotton rat (Sigmodon Hispidus), rice rat (Oryzomys palustris), and white-footed mouse (Peromyscus leucopus) all can carry and spread hantavirus pulmonary syndrome (also called HPS or simply hantavirus).).

This is one of the most serious illnesses that can be carried by rodents, receiving a good deal of attention in recent. The following is a list of diseases spread by rats, rodents and insects that feed or travel on these rodents like: fleas, ticks or mites.

HANTAVIRUS. Most commonly found in the white-footed mouse, cotton rat and rice rat, the Hantavirus is a potentially life-threatening disease that currently has no specific treatment, cure or vaccine. Mackintosh, N.J. The effects of overtraining on a reversal and a nonreversal shift. Journal of Comparative and Physiological Psychology, 55, Mackintosh, N.J.

The effect of irrelevant cues on reversal learning in the rat. British Journal of Psychology, 54, Pigeons fail to anticipate upcoming the remaining within-session sequence when trained with multiple sequences Muhammad A. Qadri, Rebecca M. Rayburn-Reeves, & Robert G.

Cook (Tufts University) The traditional two-item midsession reversal task shows that pigeons respond to time-based cues in an anticipatory fashion.

Start studying RAT 4. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Sequences of positions for the placing of the positive stimulus in a 2-choice visual discrimination task as constructed by Gellerman are examined by means of a hypothesis-analysis technique and are found to be unsatisfactory on 2 counts: (a) They fail to ensure that no position hypothesis will produce other than chance performance on the learning curve, and (b) they fail to prevent the.

The study of time perception is a field within psychology, cognitive linguistics and neuroscience that refers to the subjective experience, or sense, of time, which is measured by someone's own perception of the duration of the indefinite and unfolding of events. The perceived time interval between two successive events is referred to as perceived duration.

This page provides links to example programs for: Econometric Analysis, 7e, by William H. Greene (, Prentice Hall) This textbook is also available for purchase from Estima. The Zip file listed first in the table below includes all the sample programs, data files (when available), and, in some cases, files containing RATS procedures used by the examples.

mice, rats, and birds from AWA DEC AWA amendment requires consideration of alternatives, establishes Institutional Animal Care and Use Committees JAN U.S. District Court calls USDA exclusion of mice, rats, and birds “arbitrary and violates the law” MAR ARDF sues USDA for inclusion of mice, rats, and birds in AWA AUG-SEPT Schusterman, R.

Successive discrimination-reversal training and multiple discrimination training in one-trial learning by chimpanzees. Journal of Comparative and Physiological Psychology,58. The comparability of performance of the pigeon, rat, and chimpanzee, either pecking a key or pressing a lever, is evident.

Likewise, during a 5-minute fixed-interval schedule (lower right frame), the comparability of performance of rats, pigeons, and cats pecking a key, pressing a lever, wheel-running, or pulling a knob is illustrated.

L ongitudinal growth of long bones depends on a functional growth plate with precise coordination, both temporally and spatially, of a multitude of processes. Overall growth is regulated systemically by growth hormone, with important contributions from gluco-corticoids and thyroid hormone (Siebler et al.

).At the growth plate, the effects of all three factors converge via locally acting. body weight, in SHR and WKY rats, 65, ; and response acquisition, 67, ; choice between constant and variable alternatives, 73, 79; stability under free-feeding conditions, 86, ; seasonal variation and delayed matching-to-sample performance in pigeons, 88, book reviews, history of in JEAB, 65,   Pre-test exposure to training-related cues is known to improve subsequent retention performance.

To identify brain regions engaged in processes promoted by retrieval cues, a brain imaging approach using the [ C]glucose autoradiographic technique was e–Dawley rats trained in a brightness discrimination avoidance task were submitted to different cueing conditions after a 1. successive reversal learning after aquiring two chouce discrimination with 1 stim paired with reinforcemnt and the other with non reinforcement, stimulus reinforcer validity is switched until the animals reach an acquisition criterion and then switched back again and so on.

main interest is to see if there is progressive improvement in. Female rats are polyestrous with a day cycle hr postpartum estrus after parturition. Breeding normally occurs at night. Mating can be confirmed by vaginal plug. Mix of dried semen and vaginal secretions that lasts hrs after mating. Gestation around 22 days.

Litter size from pups. Rats weaned at weeks. Rat life span. - 3 years. Rat T. Rats HR. - bpm. Rats RR. 70 - brpm. Guppies can recognize an object in a series based on its ordinal position.

We initially used a procedure similar to those previously adopted for studying rats, chicks and honeyb19,In each trial, subjects sequentially encountered 8 identical feeders placed in a line (Fig.

1a).All feeders could be opened but only the 3 rd feeder contained food. In order to prevent the use of non. The present findings suggest that the internal magnitude is essentially determined by the numerosity of the stimulus collections and that nonnumerical cues bear minimal contributions, if any.

The internal magnitude coding for the number of elements in the stimulus collections would in turn control the emission of presses, either on a discrete.

Breeding and reproduction in rats can decrease because of factors such as age, malnutrition, abnormal light cycles, cold environment, cysts on the ovaries, tumors, and inadequate nesting material. Pregnant females may abort, abandon, or eat their babies because of inadequate food, lack of water, overcrowding in group housing, inadequate nesting.

reversal of most invasion impacts once rats are removed; (2) indirect effects of rats via alterations in seabird populations are large and primarily responsible for differences between INVADED and UNINVADED islands. This would result in little change following the removal of rats unless seabird colonies recover.

Four penguins (Spheniscus demersus) were trained to discriminate line length in a simultaneous discrimination the birds' performances reached a discrimination criterion, the reinforcement ratio was decreased to After the ratio of correct trials reached in three successive sessions with a partial reinforcement procedure, probe‐test sessions were introduced.

Seamans JK(1), Lapish CC, Durstewitz D. Author information: (1)Department of Psychiatry and the Brain Research Centre, University of British Columbia, Vancouver, BC, Canada V6T2B5. [email protected] There is a long-standing debate about whether rats. Rat-catchers were hired to exterminate rats and capture live ones for rat fights, rat coursing, and rat pits.

Rat-catchers captured and housed wild rats in cages as well (Matthews ). During this time, naturally occurring albino, black, and hooded Norway rats may have preferentially captured or chosen from litters of captive rats for their.

Are also pigeons sensitive to this cue. or were using a numerosity assessment of “greater than” to make their selection. In a visual successive task, tamarins observed the sequential dropping of sweetened cereal into 2 different inverted cups (of the amounts 3 vs.

6 and 0 vs. 6) and were allowed to tip over a single cup to obtain. Rats are some of the most common and formidable pests in the world — damaging and contaminating food, structures and human health.

Although people don't usually see the actual rats, signs of their presence are relatively easy to identify. Two primary species of rats inhabit North American homes: the roof rat and the Norway rat. Situations that lead to ambiguity.

Low contingency situations are characterized by unpaired presentations of either the cue or the outcome, or both, and these can be administered before or after cue-outcome pairings or interspersed between cue-outcome pairings (e.g., Miguez, Witnauer, & Miller, ).Context dependency of acquired responding is often observed when cue- or outcome-alone.Animal cognition encompasses the mental capacities of non-human study of animal conditioning and learning used in this field was developed from comparative has also been strongly influenced by research in ethology, behavioral ecology, and evolutionary psychology; the alternative name cognitive ethology is sometimes used.

Many behaviors associated with the term.The Roof Rat (Rattus Rattus) Body: Sleek and slimmer than the Norway rat; Fur: Light black to black ; Belly color: Off-white to gray; Weight: 5 to 9 ounces; Length: About 14 1/2 inches long; Tail: Hairless and longer than the combined length of its head and body; Ears: Ears, and eyes, are larger than those of the Norway rat; Location: Found primarily in the southeastern states and western.

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