Γer ( les comportementalistes), agrud, yettlal-d s tzemmar i d-yettbanen s tikli ur nerkid (comportement initial), ɣef uselmad ad tent-yesnerni s yigburen akken ad yaweḍ ɣer tikli i yebɣa. D ayen i wumi i nsema ass-agi s: unekmar s yiswan.