scholarly journals Repeated presentation for identification of the same person by the same features: problems of admissibility

2018 ◽  
Keyword(s):  
Repeated Presentation

Dopamine and inverse incentive learning

2018 ◽  
Author(s):  
Richard J. Beninger
Keyword(s):  
Dopamine Neurons ◽  
Incentive Learning ◽  
Repeated Presentation ◽  
Aversive Stimuli ◽  
Incentive Value ◽  
Conditioned Incentive Stimuli

Dopamine and inverse incentive learning explains that dopamine determines an incentive–value continuum. Novel and intense stimuli innately produce rapid dopamine neurons activation followed by inhibition. The repeated presentation of novel stimuli leads to a loss of this effect. Aversive stimuli, biologically important by definition, often deactivate dopamine neurons and may produce inverse incentive learning, leading to conditioned inverse incentive stimuli with decreased ability to elicit approach and other responses. The offset of aversion may increase the firing of dopamine neurons producing incentive learning about safety-related stimuli. Habituation to stimuli enhances their ability to produce inverse incentive learning, suggesting that inverse incentive learning may occur during habituation. In the end, there may be no “neutral” stimuli, only stimuli that lie on a continuum of incentive value from strong conditioned incentive stimuli to strong conditioned inverse incentive stimuli with most of the things we encounter in day-to-day life falling in between.

First trial and StartReact effects induced by balance perturbations to upright stance

2013 ◽  
Vol 110 (9) ◽  
pp. 2236-2245 ◽  
Author(s):  
A. D. Campbell ◽  
J. W. Squair ◽  
R. Chua ◽  
J. T. Inglis ◽  
M. G. Carpenter
Keyword(s):  
Startle Response ◽  
Support Surface ◽  
Wrist Movement ◽  
Repeated Presentation ◽  
Trial Effect ◽  
Acoustic Stimuli ◽  
Postural Responses ◽  
Startreact Effect ◽  
Startling Stimulus ◽  
Repeated Test

Postural responses (PR) to a balance perturbation differ between the first and subsequent perturbations. One explanation for this first trial effect is that perturbations act as startling stimuli that initiate a generalized startle response (GSR) as well as the PR. Startling stimuli, such as startling acoustic stimuli (SAS), are known to elicit GSRs, as well as a StartReact effect, in which prepared movements are initiated earlier by a startling stimulus. In this study, a StartReact effect paradigm was used to determine if balance perturbations can also act as startle stimuli. Subjects completed two blocks of simple reaction time trials involving wrist extension to a visual imperative stimulus (IS). Each block included 15 CONTROL trials that involved a warning cue and subsequent IS, followed by 10 repeated TEST trials, where either a SAS (TESTSAS) or a toes-up support-surface rotation (TESTPERT) was presented coincident with the IS. StartReact effects were observed during the first trial in both TESTSAS and TESTPERT conditions as evidenced by significantly earlier wrist movement and muscle onsets compared with CONTROL. Likewise, StartReact effects were observed in all repeated TESTSAS and TESTPERT trials. In contrast, GSRs in sternocleidomastoid and PRs were large in the first trial, but significantly attenuated over repeated presentation of the TESTPERT trials. Results suggest that balance perturbations can act as startling stimuli. Thus first trial effects are likely PRs which are superimposed with a GSR that is initially large, but habituates over time with repeated exposure to the startling influence of the balance perturbation.

scholarly journals When twice is better than once: increased liking of repeated items influences memory in younger and older adults

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Rocco Palumbo ◽  
Alberto Di Domenico ◽  
Beth Fairfield ◽  
Nicola Mammarella
Keyword(s):  
Older Adults ◽  
Recognition Memory ◽  
Memory Task ◽  
Memory Encoding ◽  
Mere Exposure Effect ◽  
Differential Impact ◽  
Younger Adults ◽  
Repeated Presentation ◽  
Exposure Effect ◽  
Better Than

Abstract Background Numerous studies have reported that the repeated presentation of a stimulus leads to an increase in positive affect towards the stimulus itself (the so-called mere exposure effect). Here, we evaluate whether changes in liking due to repetition may have a differential impact on subsequent memories in younger and older adults. Method In two experiments, younger and older adults were asked to rate a series of nonwords (Experiment 1) or unfamiliar neutral faces (Experiment 2) in terms of how much they like them and then presented with a surprise yes–no recognition memory task. At study, items were repeated either consecutively (massed presentation) or with a lag of 6 intervening items (spaced presentation). Results In both experiments, participants rated spaced repeated items more positively than massed items, i.e. they liked them most. Moreover, older adults remembered spaced stimuli that they liked most better than younger adults. Conclusions The findings are discussed in accordance with the mechanisms underlying positivity effects in memory and the effect of repetition on memory encoding.

Repeated Presentation of Stimuli and Production of Original Response by English-Speaking Indian High School Students

1993 ◽  
Vol 77 (1) ◽  
pp. 348-350 ◽  
Author(s):  
Basanti D. Chakraborty ◽  
Joe Khatena ◽  
David T. Morse
Keyword(s):  
High School ◽  
High School Students ◽  
School Students ◽  
Repeated Presentation ◽  
Original Response ◽  
English Speaking ◽  
Main Effects

Sounds and Images, a measure of originality, was administered to 131 English-speaking high school students of Orissa, India in 1987. The test has two forms, viz., IA and IB. Each form has four sounds which were presented three times. To each the students wrote their verbal images which were scored for originality and analyzed for effects of multiple presentation and differential sounds. The main effects of sounds (IA, IB), of presentation (IA), and the interaction of presentation by sound (IB) were nonsignificant, but presentation (IB) and the interaction of presentation by sound were significant.

scholarly journals Delayed Presentation of Posttraumatic Diaphragmatic Hernia Masquerading as Recurrent Acute Asthmatic Attack

2017 ◽  
Vol 2017 ◽  
pp. 1-3
Author(s):  
A. I. El-Yakub ◽  
U. M. Bello ◽  
A. A. Sheshe ◽  
H. U. Naaya
Keyword(s):  
Diaphragmatic Hernia ◽  
Abdominal Injury ◽  
Delayed Presentation ◽  
Repeated Presentation ◽  
Asthmatic Attack ◽  
Blunt Abdominal Injury ◽  
Missed Diagnosis

Diaphragmatic hernia following blunt abdominal injury is extremely rare and often diagnosed late. Missed diagnosis is also common with this condition. We herein present a delayed presentation of diaphragmatic hernia following blunt abdominal injury that was initially misdiagnosed as recurrent acute asthmatic attack due to repeated presentation with episodic difficulty in breathing.

A Study in India of Originality and Repeated Presentation of Sound Stimuli

1985 ◽  
Vol 61 (3) ◽  
pp. 754-754 ◽  
Author(s):  
Joe Khatena ◽  
Neha Sharad ◽  
Anjoo Sikka
Keyword(s):  
Repeated Presentation

Effects of hypothalamic stimulation on unit responses recorded from neurons of sensorimotor cortex of awake cats during conditioning

1983 ◽  
Vol 49 (3) ◽  
pp. 780-791 ◽  
Author(s):  
C. D. Woody ◽  
E. H. Kim ◽  
N. E. Berthier
Keyword(s):  
Sensorimotor Cortex ◽  
Rapid Development ◽  
Behavioral Observation ◽  
Hypothalamic Stimulation ◽  
Unit Response ◽  
Repeated Presentation ◽  
Rapid Acquisition ◽  
Behavioral Conditioning ◽  
Layer V ◽  
Awake Cats

1. The activity of single units of the coronal pericruciate (CPC) cortex was studied in 11 awake cats during sessions in which a click conditioned stimulus (CS) was repeatedly paired with glabella tap unconditioned stimulus (US) and hypothalamic stimulation (HS). Effects of HS on the activity of cortical units were also studied during sessions in which HS alone was delivered repeatedly every 10 s. 2. HS evoked an increase in spike activity of less than 60 ms latency in 89 of 116 units tested. 3. Repeated presentation of HS that was effective in producing rapid behavioral conditioning resulted in a characteristic reduction in the latency of discharge evoked by HS in cortical units. 4. Short-latency activation (less than 20 ms) of units of the sensorimotor cortex appeared to be characteristic of HS that led to enhanced rates of conditioned response (CR) acquisition. One of the cells responding in this way was identified as a pyramidal cell of layer V by intracellular injection of horseradish peroxidase (HRP). 5. Further analyses of activity were performed on 16 units of the CPC cortex that were followed through conditioning (or reconditioning) and extinction of the CR. After less than 10 CS-US-HS pairings, there was a selective augmentation of unit response to the CS but not of response to an explicitly unpaired discriminative stimulus (DS). Responses to the CS were not similarly augmented when presentations of HS preceded rather than followed the presentations of the CS and US. The rapid development of CS-evoked unit activity coincided with the rapid acquisition of discriminative CRs behaviorally. 6. During conditioning, the most conspicuous increases in CS-evoked unit response occurred at latencies 100 ms or more after onset of the click CS. This corresponded with the behavioral observation that the majority of eye blink CRs occurred with onset latencies longer than 100 ms.

scholarly journals The influence of extinction and counterconditioning procedures on operant evaluative conditioning and intersecting regularity effects

2020 ◽  
Vol 7 (10) ◽  
pp. 192085
Author(s):  
Sean Hughes ◽  
Simone Mattavelli ◽  
Ian Hussey ◽  
Jan De Houwer
Keyword(s):  
Mere Exposure ◽  
Evaluative Conditioning ◽  
Single Stimulus ◽  
Learning Phase ◽  
Multiple Forms ◽  
Future Directions ◽  
Repeated Presentation ◽  
Link Type ◽  
Approach Avoidance ◽  
Practical Implications

One of the most effective methods of influencing what people like and dislike is to expose them to systematic patterns (or ‘regularities’) in the environment, such as the repeated presentation of a single stimulus (mere exposure), two or more stimuli (evaluative conditioning (EC)) or to relationships between stimuli and behaviour (approach/avoidance). Hughes et al . (2016) J. Exp. Psychol. Gen. 145 , 731–754. ( doi:10.1037/xge0000100 ) found that evaluations also emerge when regularities in the environment intersect with one another. In this paper, we examined if evaluations established via operant EC and intersecting regularities can be undermined via extinction or revised via counterconditioning. Across seven pre-registered studies ( n = 1071), participants first completed a learning phase designed to establish novel evaluations followed by one of multiple forms of extinction or counterconditioning procedures designed to undo them. Results indicate that evaluations were— in general —resistant to extinction and counterconditioning. Theoretical and practical implications along with future directions are discussed.

scholarly journals When True Recognition Suppresses False Recognition: Evidence from Amnesic Patients

1998 ◽  
Vol 10 (6) ◽  
pp. 668-679 ◽  
Author(s):  
Daniel L. Schacter ◽  
Mieke Verfaellie ◽  
Michael D. Anes ◽  
Carrie Racine
Keyword(s):  
Episodic Memory ◽  
Signal Detection ◽  
Study List ◽  
False Recognition ◽  
Present Experiment ◽  
Healthy Controls ◽  
Repeated Presentation ◽  
Control Subjects ◽  
Insight Into ◽  
Normal Controls

False recognition occurs when people mistakenly claim that a novel item is familiar. After studying lists of semantically related words, healthy controls show extraordinarily high levels of false recognition to nonstudied lures that are semantic associates of study list words. In previous experiments, we found that both Korsakoff and non-Korsakoff amnesic patients show reduced levels of false recognition to semantic associates, implying that the medial temporal/diencephalic structures that are damaged in amnesic patients are involved in the encoding and/or retrieval of information that underlies false recognition. These data contrast with earlier results indicating greater false recognition in Korsakoff amnesics than in control subjects. The present experiment tests the hypothesis that greater or lesser false recognition of semantic associates in amnesic patients, relative to normal controls, can be demonstrated by creating conditions that are more or less conducive to allowing true recognition to suppress false recognition. With repeated presentation and testing of lists of semantic associates, control subjects and both Korsakoff and non-Korsakoff amnesics showed increasing levels of true recognition across trials. However, control subjects exhibited decreasing levels of false recognition across trials, whereas Korsakoff amnesic patients showed increases across trials and non-Korsakoff amnesics showed a fluctuating pattern. Consideration of signal detection analyses and differences between the two types of amnesic patients provides insight into how mechanisms of veridical episodic memory can be used to suppress false recognition.

Long-Term Effect of Repetition on Judgments of Grammaticality

1987 ◽  
Vol 65 (1) ◽  
pp. 295-299 ◽  
Author(s):  
Hiroshi Nagata
Keyword(s):  
Term Effect ◽  
Repeated Presentation ◽  
Long Term Effect

11 students were asked again to judge the relative grammaticality of the sentences which had been presented repeatedly 4 mo. previously. The repetition treatment involved repeated presentation of the sentences. The findings show that the stringent judgment criterion adopted 4 mo. before is still applied when judging the grammatical sentences. These findings cannot be explained by a satiation theory which does not predict the long-term effect of repetition on judgments of grammaticality.

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