Are three-sample tasks less sensitive than two-sample tasks? Memory effects in the testing of taste discrimination

Sensory discrimination by consumers of multiple stimuli from a reference: Stimulus configuration in A-Not AR and constant-ref. duo-trio superior to triangle and unspecified tetrad?

“…For the triangle test, the test sequence has a significant effect on discrimination performance (cf. Kim et al, 2014;Lau, O'Mahony, & Rousseau, 2004;O'Mahony, 1995;O'Mahony & Odbert, 1985). Recently it has been also found that the constant-ref.…”

“…Yet, due to the sequence effects of the many discrimination tests including the triangle and duo-trio tests with the balanced stimulus design (cf. Kim et al, 2014;Lau et al, 2004;O'Mahony, 1995;O'Mahony & Odbert, 1985), when studying consumer discrimination, it is not desirable to use only one test sequence, rather replicated tests using all possible test sequences per subject in a balanced design is more appropriate. In situations with replicated tests per consumer subject, subjects' responses are generally pooled over many subjects and the number of tests can be quite large.…”

The evolution of a model: A review of Thurstonian and conditional stimulus effects on difference testing

“…Distortion of memory over time is a source of variance. Thus, longer time intervals between tasting and more stimuli can cause decay and interference for memory 'traces' (Avancini de Almeida, Cubero, & O'Mahony, 1999;Cubero, Avancini de Almeida, & O'Mahony, 1995;Lau et al, 2004;Rousseau et al, 1998Rousseau et al, , 1999Rousseau et al, , 2002). An obvious further source of variance in sensory evaluation is lack of product homogeneity.…”

“…With the adoption of Thurstonian and signal detection approaches, d 0 measures have been used for comparison of subjects' performance on a variety of discrimination test protocols (Braun, Rogeaux, Schneid, O'Mahony, & Rousseau, 2004;Delwiche & O'Mahony, 1996a, 1996bGeelhoed, MacRae, & Ennis, 1994;Huang & Lawless, 1998;Lau, O'Mahony, & Rousseau, 2004;MacRae & Geelhoed, 1992;Masuoka, Hatjopoulos, & O'Mahony, 1995;Rousseau & O'Mahony, 1997, 2001Rousseau, Meyer, & O'Mahony, 1998;Rousseau, Rogeaux, & O'Mahony, 1999;Rousseau, Stroh, & O'Mahony, 2002;Stillman, 1993;Stillman & Irwin, 1995;Tedja, Nonaka, Ennis, & O'Mahony, 1994).…”

Can the same-different test use a β-criterion as well as a τ-criterion?

“…Some authors have used the short version (Lau, O'Mahony, & Rousseau, 2004;Rousseau & O'Mahony, 2001;Stillman & Irwin, 1995) while others used the long version (Rousseau & O'Mahony, 2000;Rousseau, Stroh, & O'Mahony, 2002) or both (Rousseau et al, 1998;Rousseau, Rogeaux, & O'Mahony, 1999). Authors have also used a modified method in which the reference is always the same stimulus (Avancini de Almeida, Cubero, & O'Mahony, 1999;Cubero et al, 1995;Delwiche & O'Mahony, 1996).…”