Opposite perceptual biases in analogous auditory and visual tasks are unique to consonant–vowel strings and are unlikely a consequence of repetition

Figures & data

Figure 1. A schematic illustration of the four laterality models: (A) dissociable laterality, (B) modality laterality, (C) stimuli laterality, and (D) unitary laterality.

Figure 2. A schematic illustration of each of the four behavioural laterality tasks (not to scale).

Figure 3. Count of correctly identified stimuli presented to the left and right ear/visual field across each behavioural task: (A) consonant-vowel dichotic listening, (B) word dichotic listening, (C) consonant-vowel visual half-field, and (D) word visual half-field. Dots represent the count of correct answers for each participant.

Figure 4. Count of correctly identified stimuli presented to the left and right ear/visual field across each experimental block for the four behavioural laterality tasks: (A) consonant-vowel dichotic listening, (B) word dichotic listening, (C) consonant-vowel visual half-field, and (D) word visual half-field. Dots represent the count of correct answers for each participant.

Table 1. Laterality indices, split-half reliability, and disattenuated and attenuated correlation coefficients.

			Disattenuated			Attenuated
Task	Mean LI (SD)	Split-half	DL CV	DL Word	VHF CV	DL CV	DL Word	VHF CV
	25.76 (29.06)	0.76	–			–
DL word	34.82 (37.88)	0.76	0.78	–		1.00	–
VHF CV	−14.31 (14.53)	0.66	−0.05	0.02	–	−0.08	0.02	–
VHF Word	21.98 (13.92)	0.70	−0.01	−0.07	0.62	−0.02	−0.10	0.91

Figure 5. Scatter plots visualizing the relationships between laterality indices across each of the four behavioural tasks: (A) consonant-vowel dichotic listening and word dichotic listening, (B) consonant-vowel dichotic listening and consonant-vowel visual half-field, (C) consonant-vowel dichotic listening and word visual half-field, (D) word dichotic listening and consonant-vowel visual half-field, (E) word dichotic listening and word visual half-field, and (F) consonant-vowel visual half-field and word visual half-field. Dots represent laterality indices for each participant. Left-handed participants are shown in pink and right-handed participants are shown in blue.

Data availability statement

The materials and the data sets generated and analysed are available in the Open Science Framework (OSF) repository, https://osf.io/72sk6/. This repository also includes an R Markdown script to reproduce all analyses and generate the manuscript.