101 |
The Effect of reward on the performance of hyperactive children.Parry, Penny Anna January 1973 (has links)
No description available.
|
102 |
Stereotype threat reinterpreted as a regulatory fitGrimm Narvaez, Lisa Renee, January 1900 (has links)
Thesis (Ph. D.)--University of Texas at Austin, 2007. / Vita. Includes bibliographical references.
|
103 |
The effect of uncontrollable reward on performance and the role ofindividual difference variables (sex and level of achievement motivation) in mediating responses to uncontrollable outcomes.Buys, Nicholas John. January 1979 (has links) (PDF)
Thesis (B.A. Hons. 1980) from the Department of Psychology, University of Adelaide.
|
104 |
Effect of ratio of trial-one reward and nonreward on discrimination learning by macaque monkeysKing, James Elmer. January 1961 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1961. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (p. 21-22).
|
105 |
Effects of fixed- and variable-ratio token exchange schedules on performance with a child with autismGreaves, Stephanie A. Glenn, Sigrid S., January 2008 (has links)
Thesis (M.S.)--University of North Texas, Dec., 2008. / Title from title page display. Includes bibliographical references.
|
106 |
Immediate reward with adverse consequences the study of reinforcement traps in pre-school children /Woo, Daniel. January 1978 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 37-38).
|
107 |
The extent of B̲H̲M̲A̲ judgment rewards and losesStanfill, Floyd A. January 1986 (has links)
Thesis (M. Div.)--Grace Theological Seminary, 1986. / Abstract. Includes bibliographical references (leaves 54-57).
|
108 |
Η επίδραση των προγραμμάτων επιβράβευσης πελατών : στρατηγικές επιπτώσεις μάρκετινγκΚοτζακόλιου, Μαρία 25 May 2011 (has links)
Σκοπός της παρούσας εργασίας είναι η βαθύτερη κατανόηση της έννοιας της προσήλωσης των πελατών, η συμβολή της στη διαδικασία αποκόμισης αξίας για αμφότερους πελάτες και επιχειρήσεις διαμέσου των προγραμμάτων επιβράβευσης, αλλά και η μελέτη εκείνων των σχεδιαστικών χαρακτηριστικών και παραγόντων που συνθέτουν ένα άρτια διαμορφωμένο πρόγραμμα επιβράβευσης. / The purpose of this study is the deeper understanding of the concept of commitment to customers, the contribution to the process of obtaining value for both customers and companies through the reward programs, and the study of those design characteristics and factors that constitute a well designed reward program.
|
109 |
The Role of the Substantia Nigra in Goal Directed BehaviorBarter, Joseph William January 2015 (has links)
<p>Animals must continuously move through the environment in pursuit of the goals required to maintain homeostasis. In vertebrates, this is accomplished through an ever-changing pattern of muscle contraction in a multipurpose body, and coordinated by a hierarchy of neural circuits acting in parallel. At the lower levels of this hierarchy, spinal circuits control muscle force and length. One level above that, brainstem, midbrain and cortical circuits control various aspects of body configuration as well as a number of self-contained motor functions including locomotion and orientation. A still-higher level of organization is controlled by the basal ganglia, a set of subcortical nuclei that appear to be responsible for continuously orchestrating the extent and direction of various motor programs and body configurations for the sake of controlling a still higher level of perceptual variable, such as proximity to food. In this way, the basal ganglia orchestrate the performance of motor functions to achieve a single goal in the same way that a conductor orchestrates the performance of musicians in a symphony to achieve a single song. </p><p>Despite the continuous and graded nature of animal behavior, researchers have traditionally studied the basal ganglia in the context of highly controlled experimental tasks or neglected to record continuous measures of behavioral outputs. To address this gap, the following experiments were designed investigate role of the basal ganglia in continuously modulating unconstrained goal directed movements. In the first set of experiments (chapter 2), mice stood on a small covered perch which was continuously tipped left and right along the roll plane while neural activity was recorded wirelessly. During each recording session, mice were exposed to slow and fast speeds of postural disturbance. Pressure pads were mounted in the left and right floor of the perch to monitor mouse movement. In both putative dopamine and GABA neurons, we found two basic patterns of neural activity; one class of cell increased firing with tip to the left and decreased with tip to the right while the other class decreased firing with tip to the left and increased with tip to right. This correlation between neural firing rate and instantaneous postural disturbance is continuous and very high. The correlation is seen for both slow and fast disturbances. The majority of cells recorded fell into one of these two categories. Pressure pad readout, as expected, revealed paw forces on the left pad to increase with tilt to the left and decrease with tilt to the right while the opposite pattern was observed on the right pad. These results show continuous and graded modulation of activity in the substantia nigra during performance of an ongoing motor task and suggest that BG outputs, rather than monolithically disinhibiting brainstem motor structures, instead coordinate behavior by continuously specifying desired states of lower systems. </p><p>In the second set of experiments (chapter 3), we employed continuous motion tracking of the head in parallel with neural recording from the substantia nigra pars reticulata during a simple goal-directed task. In this study, mice were water deprived and then positioned on a perch equipped with a movable drinking spout. During each session, mice performed a simple reward-guided task in which sucrose solution was delivered in small quantities after the presentation a cue. The purpose of this task was to elicit voluntary head movements and to investigate the relationship between these continuous movements and the activity of GABA output neurons. A typical reward-directed behavior involved the movement of the whole head and body to collect the sucrose solution following its delivery. However, movements during each individual trial were unique. For all movements, the majority of GABA cells were found to either positively or negatively correlate with either X or Y axis head position vector components. These correlations were very high, and not due to averaging artifacts as trial-by-trial correlation between movement and neural activity can be clearly observed. These correlations were also independent of the presence of a reward. These data show for the first time a continuous and quantitative relationship between basal ganglia output and body posture. It is hypothesized that these signals represent reference signals sent to downstream postural and orientation controllers. In this case a baseline level of GABA activity would represent neutral reference position, and changes in activity above and below this level represent increased or decreased reference positions. </p><p>In the third set of experiments (chapter 4), we recorded from dopamine neurons in the substantia nigra pars compacta during the same task as in chapter 3. The purpose of this task was to investigate the correlation between dopamine activity and movement kinematics during goal-directed behavior. Animals were found to produce movements at the onset of the cue and also at reward delivery. Dopamine-classified cells show phasic firing or pausing at the onset of each of these movements. When compared to head movement kinematics, these patterns of neural activity correlate highly with different vector components of head acceleration and velocity; up, down, left and right. Importantly, these correlations are continuous and exist throughout the entire recording session. These correlations are also independent of the presence of reward. To test the ‘causality’ of these observed patterns, we also employed optogenetics to stimulate substantia nigra dopamine neurons expressing channel rhodopsin 2 (Chr2) while head movements were recorded and quantified. We found that stimulation of ChR2-expressing animals could elicit head movement while stimulation of control animals had no effect. Combined, these data suggest that dopamine is responsible for controlling the velocity of transitions between different body postures.</p> / Dissertation
|
110 |
Motor expectancy: the modulation of the reward positivity in a reinforcement learning motor taskTrska, Robert 30 August 2018 (has links)
An adage posits that we learn from our mistakes; however, this is not entirely true. According to reinforcement learning theory, we learn when the expectation of our actions differs from outcomes. Here, we examined whether expectancy driven learning lends a role in motor learning. Given the vast amount of overlapping anatomy and circuitry within the brain with respect to reward and motor processes, it is appropriate to examine both motor control and expectancy processes within a singular task. In the current study, participants performed a line drawing task via tablet under conditions of changing expectancies. Participants were provided feedback in a reinforcement-learning manner, as positive (✓) or negative (x) based off their performance. Modulation of expected outcomes were reflected by changes in amplitude of the human event-related potential (ERP), the reward positivity. The reward positivity is thought to reflect phasic dopamine release from the mesolimbic dopaminergic system to the basal ganglia and cingulate cortex. Due to the overlapping circuitry of reward and motor pathways, another human ERP, the bereitschatftspotential (BP), was examined. The BP is implicated in motor planning and execution; however, the late aspect of the BP shares similarity with the contingent negative variability (CNV). Current evidence demonstrates a relationship between expectancy and reward positivity amplitude in a motor learning context, as well as modulation of the BP under difficult task conditions. Behavioural data supports prior literature and may suggest a connection between sensory motor prediction errors working in concert with reward prediction errors. Further evidence supports a frontal-medial evaluation system for motor errors. Additionally, results support prior evidence of motor plans being formed upon target observation and held in memory until motor execution, rather than their formation before movement onset. / Graduate
|
Page generated in 0.0155 seconds