“…Bruce (1983), Brennen and Bruce (1991), and Stone and Valentine (2007) all reported categorical priming, as did Carson and Burton (2001) from multiple primes though not from a single prime, while Barry, Johnston and Scanlan (1998) and Young, Flude, Hellawell and Ellis (1994) reported nonsignificant categorical priming. The latter two papers both noted that the absence of categorical priming, compared with larger and statistically significant associative priming, challenged the Burton et al (1990) model of organisation of person knowledge.…”