Differences in Perceived Versus Actual Sensory Perception in Avoidant/Restrictive Food Intake Disorder

Area of Science:

• Neuroscience
• Psychology
• Sensory Science

Background:

• Avoidant/Restrictive Food Intake Disorder (ARFID) is associated with self-reported heightened taste and smell sensitivity.
• This heightened sensory perception in ARFID has not been systematically studied in laboratory settings.

Purpose of the Study:

• To investigate self-reported and performance-based taste and smell sensitivity in individuals with ARFID compared to healthy controls.
• To explore if sensory sensitivity is particularly pronounced in the ARFID-sensory sensitivity presentation.

Main Methods:

• Utilized the Adolescent/Adult Sensory Profile (AASP) for self-reported sensitivity.
• Assessed bitter taste perception using the Regional Taste Intensity Test (RTIT) and PROP test.
• Evaluated olfactory performance with the Sniffin' Sticks test (odor threshold, detection, identification).

Main Results:

• The ARFID group reported significantly higher taste and smell sensitivity on the AASP, especially those with the ARFID-sensory sensitivity presentation.
• Contrary to hypotheses, no performance-based differences in bitter taste or smell perception were found between ARFID and control groups.
• This indicates a discrepancy between subjective reports and objective measures of sensory sensitivity in ARFID.

Conclusions:

• Laboratory findings reveal a significant gap between perceived and actual taste/smell sensitivity in individuals with ARFID.
• Future research should examine the replicability and therapeutic potential of this perceived-versus-actual sensory discrepancy in ARFID.
• Leveraging this discrepancy may aid in developing interventions for food exposures in ARFID patients.