Dual Senses, Divergent Strategies? Unique Patterns in Haptic Versus Visual Search Tasks
Wed-Main hall - Z2b-Poster 3-8805
Presented by: Marian Sauter
This research investigates the influence of task difficulty on haptic search behaviors, extending the foundational work of Kristjánsson et al. (2014) on attentional constraints in visual foraging. The primary aim was to determine how variations in the similarity between targets and distractors affect search efficiency and strategy, as evidenced by changes in search time and target-type switches, phenomena well-documented in visual foraging. Participants, blindfolded, were tasked with identifying and retrieving 20 target objects from a tray under three distinct difficulty conditions. The findings revealed a higher frequency of target-type switches in both the easiest and most challenging conditions, with a notable increase in reaction times correlating with difficulty. Importally, exploratory analysis highlighted a profound influence of visual-categorical processing on haptic search efficiency, underscoring the complex interplay between sensory modalities in human cognition. A follow-up visual search experiment based on Kristjánsson's design revealed that the amount of target-type switches depends on categorical differences between the easy and medium difficulty conditions and not merely difficulty, which also explains our higher target-type switches in the easy and hard condition. These insights not only expand our understanding of visual and haptic search mechanisms but also underscore the importance of considering multisensory integration in search tasks in addition to visual spaces in isolation.
Keywords: attention, visual search, haptic search, foraging, multisensory integration