Effects Of Fixed-interval Schedule And Reinforcer Duration On Responding Reinforced By The Opportunity To Run

Two experiments investigated the effects of schedule value and reinforcer duration on responding for the opportunity to run on fixed-interval (FI) schedules in rats. In the first experiment, 8 male Wistar rats were exposed to FI 15-s, 30-s, and 60-s schedules of wheel-running reinforcement. The operant was lever pressing, and the consequence was the opportunity to run for 60 s. In the second experiment, 8 male Long-Evans rats were exposed to reinforcer durations of 15 s, 30 s, and 90 s. The schedule of reinforcement was an FI 60-s schedule. Results showed that postreinforcement pause and wheel-running rates varied systematically with reinforcer duration but not schedule value. Local lever-pressing rates decreased with reinforcer duration. Overall lever-pressing rates decreased with reinforcer duration but increased with schedule value. Although the reinforcer-duration effect is consistent with previous research, the lack a schedule effect appears to be the result of long post-reinforcement pauses following wheel-running reinforcement that render the manipulation of the interval requirement ineffective.     

Varying wheel-running reinforcer duration within a session: effect on the revolution-postreinforcement pause relation

Previous investigations of wheel-running reinforcement that manipulated reinforcer duration across conditions showed a strong relation between wheel-running rate and average postreinforcement pause (PRP) duration. To determine if the basis of this relation across conditions was a local effect of fatigue or satiation, the correlation between revolutions run and the duration of the immediately following PRP was investigated under conditions in which reinforcer duration was either constant or variable within a session. Seven male Wistar rats pressed a lever on a fixed-interval 60-s reinforcement schedule with the opportunity to run for 60 s as the reinforcing consequence. In the constant-duration condition, the duration of the reinforcer was always 60 s. In the variable-duration condition, the duration of the reinforcer varied between 2 and 240 s with a mean of 60 s. Mean correlations between revolutions run and the next PRP duration for constant, variable, and constant conditions were -.07, .20, and -.07, respectively. Although the positive correlation in the variable-duration condition is consistent with an effect of momentary fatigue or satiation, little of the variance in PRP duration appears to be attributable to these factors.     

Is Consumer Culture Theory research or realpolitik? A sociology of knowledge analysis of a scientific culture

When Consumer Culture Theory (CCT) was introduced by Arnould and Thompson ( 2005 ) it was part of a strategy to create legitimacy for interpretive research. It was argued that interpretive researchers needed to be more pragmatic in their attitude. This was a fundamental change in the scientific culture in this stream of research. This paper analyses these changes and studies how CCT represents a new and pragmatic attitude. It is shown how the changes intended by CCT can imply a shift from a focus on new groundbreaking research to an awareness of the consequences of realpolitik. This strategic move can be seen as an example of how scientific cultures try to move from a marginal position to the mainstream. The consequences of this attempt to manage science are analysed, and solutions to problems created by these changes are developed. Copyright © 2016 John Wiley & Sons, Ltd.     

Introduction: Postphenomenological Research

This introduction to the special issue of Human Studies on postphenomenology outlines specific developments which have led to this style of phenomenology. Postphenomenology adapts aspects of pragmatism, including its anti-Cartesian program against early modern subject/object epistemology. Postphenomenology retains and emphasizes the use of phenomenological variations as an analytic tool, and in practice postphenomenology takes what is commonly now called “an empirical turn,” which deeply analyzes case studies or concrete issues under its purview.

Rhyming abilities in 9-month-olds: The role of the vowel and coda explored

Nine-month-olds can respond to a change in rhyme when the conditioned head turn procedure is used [Hayes, R. A., Slater, A., & Brown, E. (2000). Infants’ ability to categorise on the basis of rhyme.Cognitive Development, 15, 405–419]. However, it is not known whether infants are detecting the change in vowel, the change in coda, or both. In Study 1, it was found that 9-month-old infants clearly attend to both the vowel and coda of the syllables presented, since they successfully categorised the syllables on the basis of both. However, infants found it harder to detect the difference when only the vowel or the coda changed than when both changed, a pattern of results that was also found in Study 2 with adults. These findings suggest that preverbal 9-month-olds parse syllables into smaller units than just onset and rime, and do so in a manner that is comparable to that of adults. The findings are discussed in relation to work demonstrating a relationship between rhyming ability and competence in word learning, reading and writing.     

信息哲学与未来中国科技哲学的基础

The research programme of the philosophy of information (PI) proposed in 2002 made it an independent area or discipline in philosophical research. The scientific concept of ‘information’ is formally accepted in philosophical inquiry. Hence a new and tool-driven philosophical discipline of PI with its interdisciplinary nature has been established. Philosophy of information is an ‘orientative’ rather than ‘cognitive’ philosophy. When PI is under consideration in the history of Western philosophy, it can be regarded as a shift of large tradition. There are three large traditions at large, known as Platonic, Kantian and Leibniz-Russellian. In the discussion of the position of the possible worlds, we have modal Platonism and modal realism, but both of the theories are made in the framework of Western philosophy. In this essay, it is argued that possible worlds could be seen as worlds in information, which is then an interpretation of modal information theory (MIT). Our interpretation is made on the basis of Leibniz’s lifelong connection with China, a fact often overlooked by the Western philosophers. Possible world theory was influenced by the Neo-Confucianism flourishing since the Song Dynasty of China, the foundation of which is Yijing. It could be argued that Leibniz’s possible world theory was formulated in respect to the impact of the thoughts reflected in Yijing, in that one of the prominent features is the model-theoretic construction of theories. There are two approaches to theory construction, i.e., axiom-theoretic and model-theoretic. The origin of the former is from ancient Greece and the latter from ancient China. And they determined the different features of theoretic structures between the oriental and occidental traditions of science and technology. The tendency of the future development of science and technology is changing from the axiom-theoretic to the model-theoretic orientation, at least the two approaches being complementary each other. To some extent, this means the retrospective of tradition in the turning point of history, and some of the China’s cultural traditions might become the starting points in formulating the future Chinese philosophy of science and technology.     

A brief opportunity to run does not function as a reinforcer for mice selected for high daily wheel-running rates

Mice from replicate lines, selectively bred based on high daily wheel-running rates, run more total revolutions and at higher average speeds than do mice from nonselected control lines. Based on this difference it was assumed that selected mice would find the opportunity to run in a wheel a more efficacious consequence. To assess this assumption within an operant paradigm, mice must be trained to make a response to produce the opportunity to run as a consequence. In the present study an autoshaping procedure was used to compare the acquisition of lever pressing reinforced by the opportunity to run for a brief opportunity (i.e., 90 s) between selected and control mice and then, using an operant procedure, the effect of the duration of the opportunity to run on lever pressing was assessed by varying reinforcer duration over values of 90 s, 30 min, and 90 s. The reinforcement schedule was a ratio schedule (FR 1 or VR 3). Results from the autoshaping phase showed that more control mice met a criterion of responses on 50% of trials. During the operant phase, when reinforcer duration was 90 s, almost all control, but few selected mice completed a session of 20 reinforcers; however, when reinforcer duration was increased to 30 min almost all selected and control mice completed a session of 20 reinforcers. Taken together, these results suggest that selective breeding based on wheel-running rates over 24 hr may have altered the motivational system in a way that reduces the reinforcing value of shorter running durations. The implications of this finding for these mice as a model for attention deficit hyperactivity disorder (ADHD) are discussed. It also is proposed that there may be an inherent trade-off in the motivational system for activities of short versus long duration.     

Language, moral order and political praxis

The paper argues that the debate between objectivist criticism and postmodern critique represents a fracturing of the modes of mundane social and linguistic practice. The two together miss the open-textured character of language-in-use and the reflexive properties of situated human practice. Both difference and agreement are grounded in the multiplicity of criteria that are a feature of the logical grammar of language, and therefore of everyday praxis, including that of critique. To escape the duality of foundationalism on the one hand, and radical relativism on the other, attention to the praxiological details of human action and reasoning is needed. The paper draws on Wittgensteinian philosophy and ethnomethodological studies of reasoning to make its case.     

Effects upon rats' responses on a running wheel of single alternation of large and small rewards and external cues

Thirty-two rats were trained to run on a running wheel for one or six pellets of food, in either single alternation (SA) or quasi-random sequences of reward magnitude and with external cues either informing or not informing the rats of the reward magnitude. Reward-magnitude discrimination was clearly shown when the informative cues were given, but without such cues the SA patterning of responding appeared only late in training. The reward-magnitude discrimination developed most quickly when internal (SA) cues and external informative cues were both present; the effects of these two classes of cues on discrimination were interactive rather than additive. Possible explanations are given for the superior discrimination under the condition where both the internal and external cues were present over the condition when only the external cues were present.