Prospective memory rehabilitation based on visual imagery techniques

Abstract

Despite the frequency of prospective memory (PM) problems in the traumatic brain injury (TBI) population, there are only a few rehabilitation programmes that have been specifically designed to address this issue, other than those using external compensatory strategies. In the present study, a PM rehabilitation programme based on visual imagery techniques expected to strengthen the cue–action association was developed. Ten moderate to severe chronic TBI patients learned to create a mental image representing the association between a prospective cue and an intended action within progressively more complex and naturalistic PM tasks. We hypothesised that compared to TBI patients (n = 20) who received a short session of education (control condition), TBI patients in the rehabilitation group would exhibit a greater improvement on the event-based than on the time-based condition of a PM ecological task. Results revealed however that this programme was similarly beneficial for both conditions. TBI patients in the rehabilitation group and their relatives also reported less everyday PM failures following the programme, which suggests generalisation. The PM improvement appears to be specific since results on cognitive control tasks remained similar. Therefore, visual imagery techniques appear to improve PM functioning by strengthening the memory trace of the intentions and inducing an automatic recall of the intentions.

Keywords:

• Prospective memory
• Cognitive rehabilitation
• Prospective remembering
• Visual imagery
• Mnemonic strategy

Acknowledgments

This research was supported by NSERC and FRSQ scholarships (M.-J. Potvin), as well as an FRSQ clinical research grant (I. Rouleau). We would like to thank Jean Bégin, PhD, for suggestions for the statistical analysis, Daniel Lamoureux, PhD, for help with the recruitment of patients, as well as Simon Charbonneau, PhD, for useful comments.