The dual mechanism of cognitive control framework (DMC) describes cognitive control via two strategies: proactive and reactive. Individuals using a proactive strategy, focus on actively maintaining goal-relevant information in memory, whereas reactive individuals store goal-relevant information and retrieve it when cues are present. Reimer and colleagues (2015, 2017) added cue-probe location shifts to the typical AX-CPT, as well as, a virtual-reality environment version of the AX-CPT. Through this, they found that the effect of location shifts vary depending on whether a proactive or reactive mode of control is utilized. Thus, the aim of the present study was to test whether the effect of location shifts on cognitive control depends on type of control strategy used. Two versions of the AX-CPT were used: shift alone and shift with no-go trials. The shift alone AX-CPT examined the influence of location shifts in proactively-biased young adults. The shift with no-go trials AX-CPT examined the influence of location shifts with a manipulation that is known to induce a reactive control strategy (Gonthier et al., 2016). It was hypothesized that cue-probe location shifts would have a differential effect on mode of control. Results demonstrated that type of AX-CPT given, cue-probe location, and type of trial presented individually influenced participant performance. There was also an interaction between AX-CPT type and trial type that provides evidence for a successful manipulation of mode of control. The hypothesized interaction between all variables, however, was not found. Possible limitations of the present study, as well as, future direction were discussed.

Doctor of Philosophy / Department of Psychological Sciences / Lester Loschky / Everyday event perception requires us to perceive a nearly constant stream of dynamic information. Although we perceive these events as being continuous, there is ample evidence that we “chunk” our experiences into manageable bits (Zacks & Swallow, 2007). These chunks can occur at fine and coarse grains, with fine event segments being nested within coarse-grained segments. Individual differences in boundary detection are important predictors for subsequent memory encoding and retrieval and are relevant to both normative and pathological spectra of cognition. However, the nature of attention in relation to event structure is not yet well understood. Attention is the process which suppresses irrelevant information while facilitating the extraction of relevant information. Though attentional changes are known to occur around event boundaries, it is still not well understood when and where these changes occur. A newly developed method for measuring attention, the Gaze-Contingent Useful Field of View Task (GC-UFOV; Gaspar et al., 2016; Ringer, Throneburg, Johnson, Kramer, & Loschky, 2016; Ward et al., 2018) provides a means of measuring attention across the visual field (a) in simulated real-world environments and (b) independent of eccentricity-dependent visual constraints. To measure attention, participants performed the GC-UFOV task while watching pre-segmented videos of everyday activities (Eisenberg & Zacks, 2016; Sargent et al., 2013). Attention was probed from 4 seconds prior to 6 seconds after coarse, fine, and non-event boundaries. Afterward, participants’ memories for objects and event order were tested, followed by event segmentation. Attention was predicted to either become impaired (attentional impairment hypothesis), or it was predicted to be broadly distributed at event boundaries and narrowed at event middles (the ambient-to-focal shift hypothesis). The results showed marginal evidence for both attentional impairment and ambient-to-focal shift hypotheses, however model fitness was equal for both models. The results of this study were then used to develop a proposed program of research to further explore the nature of attention during event perception, as well as the ability of these two hypotheses to explain the relationship between attention and memory during real-world event perception.

This thesis considers cognitive narrative a component of intelligence that specializes in generality. In exploring the ubiquitous external (mediated) and internal (cognitive) functions of narrative it provides two contributions to the literature: a uniquely cross-discipline survey of narratology that bridges humanities, social science, and computational fields; and a theory to generate cognitive personal narratives from ongoing perception. The implications of narrative cognition and cognitive narrative are discussed as well as the limitations of this introductory theory and the grounds for promising future work.

This dissertation examines conceptual reorganisation in second language learners by comparing event construal patterns in first language (L1) and second language (L2) discourse. Previous research suggests that the way grammatical aspect is encoded in the speaker's L1 can influence how events are conceptualised in their L2 (von Stutterheim & Carroll 2006). Given the lack of consensus regarding partial (Bylund 2011a) versus zero (Schmiedtová et al. 2011) susceptibility to reorganising L1 event construal patterns in L2, the present work contributes to this resonant discussion by investigating the extent to which language-specific grammatical aspectual operators influence message planning (Levelt 1989, Habel & Tappe 1999) in three typologically diverse L1 groups and four L2 groups. More specifically, film verbalisations and picture descriptions by Czech, Hungarian and English native speakers, and Czech and Hungarian learners of English at basic and advanced levels were elicited to test (a) whether crosslinguistic event construal contrasts are attributable to the differences in the grammatical means that are available for encoding temporality in a particular L1; (b) whether learners’ degree of susceptibility to reorganising L1 principles for temporal reference in the target language changes as a function of L2 proficiency; and (c) whether event construal patterns across groups remain unaffected by changes of modality (speech vs. writing) and task type. The main novel feature lies in testing L2 learners’ ability to adjust L1 thinking-for-speaking principles (Slobin 1996) in the target language through a systematic scrutiny of four conceptualisation processes abreast (i.e. event segmentation, information selection, temporal structuring and linearization).

Yes / The Atkinson-Shiffrin modal model forms the foundation of our understanding of human memory. It consists of three stores (Sensory Memory (SM), also called iconic memory, Short-Term Memory (STM), and Long-Term Memory (LTM)), each tuned to a different time-scale. Since its inception, the STM and LTM components of the modal model have undergone significant modifications, while SM has remained largely unchanged, representing a large capacity system funneling information into STM. In the laboratory, visual memory is usually tested by presenting a brief static stimulus and, after a delay, asking observers to report some aspect of the stimulus. However, under ecological viewing conditions, our visual system receives a continuous stream of inputs, which is segmented into distinct spatio-temporal segments, called events. Events are further segmented into event-segments. Here we show that SM is not an unspecific general funnel to STM but is allocated exclusively to the current event-segment. We used a Multiple-Object Tracking (MOT) paradigm in which observers were presented with disks moving in different directions, along bi-linear trajectories, i.e., linear trajectories, with a single deviation in direction at the mid-point of each trajectory. The synchronized deviation of all of the trajectories produced an event stimulus consisting of two event-segments. Observers reported the pre-deviation or the post-deviation directions of the trajectories. By analyzing observers' responses in partial- and full-report conditions, we investigated the involvement of SM for the two event-segments. The hallmarks of SM hold only for the current event segment. As the large capacity SM stores only items involved in the current event-segment, the need for event-tagging in SM is eliminated, speeding up processing in active vision. By characterizing how memory systems are interfaced with ecological events, this new model extends the Atkinson-Shiffrin model by specifying how events are stored in the first stage of multi-store memory systems.

No description available.

Personen mit Morbus Parkinson (MP) erleben Herausforderungen beim Erinnern, Planen und Ausführen täglicher Abläufe, die über motorische Symptome hinausgehen. Störungen in der Verarbeitung von Alltagsereignissen könnten eine zentrale Rolle spielen, jedoch sind potentielle Defizite und neuronale Mechanismen unzureichend untersucht. In Studie 1 untersuchten wir das Segmentierungsverhalten während der Betrachtung von naturalistischen Filmen und dessen Beziehung zum Ereignisgedächtnis. Die Ergebnisse zeigten Abweichungen im Segmentierungsverhalten bei MP, wobei größere Abweichungen mit mehr Fehlern im Gedächtnisabruf der zeitlichen Ereignisabfolge einhergingen. Darüber hinaus weisen wenige Verhaltensstudien auf eine gestörte zeitliche Ereignisverarbeitung bei MP hin, aber zugrundeliegende Mechanismen wurden selten untersucht. Resultate zur Struktur und zum Abruf von Ereigniswissen im Langzeitgedächtnis sind uneindeutig. In Studie 2 analysierten wir daher Verhaltensleistungen und ereigniskorrelierte Potenziale (ERPs) als Reaktion auf zeitliche und inhaltliche Verletzungen in Ereignissequenzen. Personen mit MP zeigten höhere Fehlerraten und verlangsamte Reaktionszeiten in Antwort auf zeitliche Ereignisfehler im Vergleich zu Kontrollprobanden. Neurophysiologisch deutete ein vorzeitiger Latenzbeginn der „late posivitive component“ (LPC) in Reaktion auf die zeitlichen Ereignisfehler bei MP darauf hin, dass diese unerwartet waren und hohe neuronale Ressourcen zur Verarbeitung erforderten. Bei inhaltlichen Verletzungen zeigten Kontrollprobanden einen N400-Effekt, der auf eine semantische Mismatch-Reaktion zwischen dem fehlerhaften Ereignis und Ereignismodell hinwies. Dieser Effekt fehlte bei der MP-Gruppe, was auf Beeinträchtigungen beim Abruf strukturierter Ereignisrepräsentationen hindeutet. Kombiniert belegen die Ergebnisse eine beeinträchtigte Alltagsereignisverarbeitung bei MP mit möglichen Auswirkungen auf Verhaltensdefizite in alltäglichen Routinen. / Persons with Parkinson’s disease (PD) encounter challenges in remembering, planning, and executing daily routines. Beyond the typical motor symptoms, impairments in processing everyday events could play an essential role in this context. However, deficits and associated underlying neuronal mechanisms of event processing in PD have hardly been investigated. In Study 1, we examined the segmentation behavior during naturalistic movie viewing (i.e., event segmentation) and its relation to event memory in PD, as respective impairments can be expected due to dysfunctions in dopaminergic striatal-cortical networks. Results showed that persons with PD deviated from healthy controls' segmentation patterns and that the more the segmentation differed from the normative pattern, the more errors persons with PD made in recalling the temporal order of the perceived events. Further, some behavioral studies suggest impaired temporal event processing in PD, but underlying mechanisms are rarely examined. Findings on long-term event knowledge are so far inconclusive. Thus, in Study 2, we analyzed behavioral performance and event-related potentials (ERPs) in response to temporally and content-related violated event sequences. Persons with PD exhibited less accurate performance and slowed reaction times to temporal violations compared to controls. On the neurophysiological level, persons with PD expressed a premature latency onset of the late positive component (LPC) upon temporal violations compared to controls suggesting that temporal errors were highly unexpected, demanding high neuronal resources to process in PD. In response to content violations, controls expressed a N400 indicating a semantic mismatch reaction between the erroneous event and the event model, which was absent in the PD group, suggesting impaired retrieval and disorganized event representations. Combined findings highlight impaired event processing in PD, shedding light on behavioral deficits in daily routines.