Razlika u reprodukciji, diskriminaciji i produkciji percipiranih i prezentiranih vremenskih intervala

doctoral thesis

• Title (english): Difference in reproduction, discrimination and production of perceived and presented time intervals
• Author: Ivan Šerbetar; MBZ: 16214505141
• Mentor: Zdravko Petanjek (mentor)
• Mentor: Predrag Zarevski (komentor)
• Committee member: Goran Šimić (predsjednik povjerenstva)
• Committee member: Ana Katušić (član povjerenstva)
• Committee member: Maja Cepanec (član povjerenstva)
• Committee member: Milan Radoš (član povjerenstva)
• Committee member: Slavica Sović (član povjerenstva)
• Granter: University of Zagreb; School of Medicine; (Croatian Institiute for Brain Research); Zagreb
• Defense date and country: 2025-02-06, Croatia
• Scientific / art field, discipline and subdiscipline: BIOMEDICINE AND HEALTHCARE; Basic Medical Sciences
• Universal decimal classification (UDC): 61 - Medical sciences

Abstract

Tajming, tj. percepcija i procesiranje vremenskih intervala, označava subjektivno iskustvo prolaženja fizičkog vremena te interpretaciju trajanja događaja, a od ključnog je značaja za kognitivno, perceptivno i motoričko funkcioniranje čovjeka.
Cilj rada bio je istražiti razlike u procesiranju vremenskih intervala u rasponu milisekundi i sekundi na temelju eksperimentalnih paradigmi reprodukcije, diskriminacije i produkcije vremenskih intervala, kako bi se dobili dokazi u prilog teoriji o jednom namjenskom (zajedničkom) mehanizmu ili intrinzičnim mehanizmima (više lokalnih mehanizama) mjerenja vremena u mozgu. U istraživanju je sudjelovalo 115 sudionika u dobi od 19-24 godine. Pokazatelje izvedbi tajminga predstavljale su vrijednosti varijabilnosti (SD i CV) i preciznosti (AI), a u daljnjim inferencijalnim analizama te su vrijednosti predstavljale zavisne varijable.
Rezultati pokazuju kako se varijabilnost izvedbi navedenih paradigmi tajminga statistički značajno razlikuje (F(1.43, 143.01) = 264.10, p < .001, ηp 2 = .73) u korist motoričkoga tajminga, koji se pokazao kao najstabilniji, dok se perceptivni tajming pokazao kao najvarijabilniji. U produkciji intervala pronađena je veća varijabilnost intervala kraćih od sekunde (F(1, 104) = 164.11, p < .001, ηp 2 = .61) i značajna povezanost unutar pojedinih skupova pokazatelja izvedbi, no ne i između jednog i drugog skupa. Pokazalo se kako radno pamćenje nije povezano s pokazateljima izvedbi u paradigmama reprodukcije i produkcije intervala, a konkurentni zadatak uzrokuje povećanje varijabilnosti motoričkog (automatskog) tajminga (F(1,90) = 122.47, p < .001, ηp 2 = .58). O rezultatima se raspravlja u bihevioralnom kontekstu eksperimenta, ali i uz korištenje argumenata iz neurobioloških teorija i istraživanja. Općenito gledano, rezultati govore u prilog teorijama prema kojima je procesiranje vremenskih intervala pod kontrolom specijaliziranih i distribuiranih mreža, a ne centralnog sata.

Abstract (english)

Timing, or the perception and processing of time intervals, refers to the subjective experience of physical time and the interpretation of event durations. It plays a crucial role in an individual's cognitive, perceptual, and motor functions. Current research aimed to explore differences in the processing of time intervals, ranging from milliseconds to seconds, using experimental paradigms involving reproduction, discrimination, and production of time intervals. The goal was to gather evidence supporting either a single dedicated mechanism (common timing) or multiple intrinsic mechanisms (local timing) for time measurement in the brain. A total of 115 participants, aged 19-24, took part in the study. Timing performance was assessed using indicators of variability (SD and CV) and precision (AI), which served as dependent variables in further inferential analyses. The findings revealed statistically significant differences in performance variability across the timing paradigms (F(1.43, 143.01) = 264.10, p < .001, ηp 2 = .73), with motor timing emerging as the most stable and perceptual timing as the most variable. Greater variability was observed in the production of intervals shorter than one second (F(1,
104) = 164.11, p < .001, ηp 2 = .61), alongside significant relationships within individual sets of performance measures, though not between the two sets. Additionally, working memory was found to be unrelated to performance in the interval
reproduction and production paradigms. However, introducing a competitive task increased the variability of motor (automatic) timing (F(1,90) = 122.47, p < .001, ηp 2 = .58). The results are discussed concerning the behavioral context of the experiment and supported by neurobiological theories. Overall, the findings suggest that the timing is governed by specialized, distributed networks in the brain, rather than by a central clock.

• Keywords: Pamćenje; kratkoročno; Percepcija vremena; Mozak; Spoznaja
• Keywords (english): Memory; Short-Term; Time Perception; Brain; Cognition
• Language: croatian
• URN:NBN: urn:nbn:hr:105:662273
• Study programme: Title: Neuroscience; Study programme type: university; Study level: postgraduate; Academic / professional title: doktor/doktorica znanosti, područje biomedicine i zdravstva (doktor/doktorica znanosti, područje biomedicine i zdravstva)
• Type of resource: Text
• Extent: 106 str.
• File origin: Born digital
• Access conditions: Open access
• Created on: 2025-02-17 12:14:03