Konings, Jip (2025) Influence of Greater ITI Times on an Object Attention Task: a Behavioral Study. Master thesis, Psychology.
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Abstract
This study examined how longer inter-trial intervals (ITIs) influence object-based attention. Inspired by Noah et al. (2023), the paradigm was adapted for future fMRI use by increasing the ITI and SOA (stimulus onset asynchrony) durations to 2000–8000 ms. Twenty-five participants completed a visual attention task in which symbolic cues (a triangle, square, or circle) predicted the likely target category, face, scene, or tool, with 80% validity. After a variable delay (SOA), participants briefly saw a composite image with overlapping objects and judged whether the cued object was blurred or clear. In invalid trials, a non-cued object appeared alongside a task-irrelevant checkerboard, requiring judgment of the non-target item. Each trial ended with another variable ITI before the next cue. Accuracy and response times were recorded. Results showed higher accuracy on valid trials, confirming attentional facilitation. Response times did not differ significantly by validity but varied across cue types, with face cues eliciting the fastest responses. These findings suggest longer ITIs preserve attentional accuracy benefits but may dampen response time costs, valuable insights for future neuroimaging research.
| Item Type: | Thesis (Master) |
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| Supervisor name: | Mathot, S. |
| Degree programme: | Psychology |
| Differentiation route: | Other [Master Psychology] |
| Date Deposited: | 19 Jun 2025 14:50 |
| Last Modified: | 19 Jun 2025 14:50 |
| URI: | http://gmwpublic.studenttheses.ub.rug.nl/id/eprint/4964 |
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