2.6. Design
A between-groups factorial study with two evaluation moments (pre-test and post-test) and four experimental groups was used (see Fig. 3): (1) VR (using only visual and hearing stimuli); (2) VR-MIP + Smell (using visual, hearing, and tactile stimuli); (3) VR-MIP + Touch (using visual, hearing, and olfactory stimuli); (4) VRMIP + Touch & Smell (using visual, hearing, tactile, and olfactory stimuli). In all groups, a VR environment and MIPs were used. The senses of sight and hearing were stimulated in all groups. In addition, the senses of smell and/or touch were stimulated in three of the experimental groups.