Chips with Everything: A Laboratory Exercise for Comparing Subjective and Objective Measurements of Potato Chips

The following laboratory exercise was designed to aid student understanding of the differences between subjective and objective measurements. Students assess the color and texture of different varieties of potato chip (crisps) by means of an intensity rating scale and a rank test and objectively with a colorimeter and texture analyzer. For data analysis, student are instructed to critically determine, using basic statistics, any differences between the subjective and objective measurement techniques. This laboratory exercise is very versatile, and although it is designed as a hands-on exercise in an undergraduate Food Analysis course, it has also been a demonstration for High School students.