Numerical anchoring effects describe the assimilative effect of a previously presented number
on subsequent numerical estimates. Such effects are robust and consequential. A number of
different accounts have been proposed to explain these effects. What is currently unclear is
under which situations different mechanisms play more or less critical roles. An extant test
from the literature is proposed as a ‘signature test’ for the operation of selective accessibility
mechanisms. Four experiments were conducted to ascertain the evidence for selective
accessibility with this test, tests that subsequently failed. A fifth experiment employed a
different methodology, and again failed to show evidence for selective accessibility.
Subsequent discussion suggests that the robustness of anchoring effects is remarkable, but the
theoretical basis for some previous tests of the selective accessibility account of anchoring is
shaky, and we advise against its use in this capacity