Table 1.

Combine and alternative method indices, with corresponding scores.

combine index	score	alternative method index
successful retrieval with the combined tool	14	successful retrieval with alternative method
combine tools successfully, retrieval attempt with combined tool	13	successful modification (twist and extend), retrieval attempt with modified tool
combine tools successfully, retrieval attempt with either or both unmodified components	12	successful modification, retrieval attempt with either or both unmodified components
combine tools successfully, no retrieval attempt	11	successful modification, no retrieval attempt
combine attempt with hollow (correct) end, retrieval attempt with either or both unmodified components	10	twist and pull attempt (unsuccessful modification), retrieval attempt with either or both unmodified components
combine attempt with hollow end, no retrieval attempt	9	twist and pull attempt, no retrieval attempt
combine attempt with black (incorrect) end, retrieval attempt with either or both unmodified components	8	twist attempt, retrieval attempt with either or both unmodified components
combine attempt with black end, no retrieval attempt	7	twist attempt, no retrieval attempt
insert finger into hollow end, retrieval attempt with either or both unmodified components	6	pull attempt, retrieval attempt with either or both unmodified components
insert finger into hollow end, no retrieval attempt	5	pull attempt, no retrieval attempt
look into or mouth hollow end, retrieval attempt with either or both unmodified components	4	bite or hand touch to black end, retrieval attempt with either or both unmodified components
look into or mouth hollow end, no retrieval attempt	3	bite or hand touch to black end, no retrieval attempt
retrieval attempt with either or both unmodified components	2	retrieval attempt with either or both unmodified components
contact, but not retrieval attempt	1	contact, but no retrieval attempt
no contact	0	no contact