The Origins of Music: Preface - Preface

intervals) maintained,they treat the transposition as equivalent to the

original melody (Chang and Trehub 1977;Trehub,Bull,and Thorpe

1984).Even if exact pitch relations are altered but contour is preserved,

infants treat the altered melody as familiar rather than new (Trehub,

Bull,and Thorpe 1984).In contrast,a change in contour resulting from

the substitution of a single tone (Trehub,Thorpe,and Morrongiello 1985)

or the reordering of tones (Trehub,Bull,and Thorpe 1984) leads infants

to consider the altered melody as unfamiliar,much like adults.As a

429 Human Processing Predispositions

Figure 23.1

Depiction of the test.The infant sits on a parent’s lap facing the experimenter (upper

panel).Patterns are presented on a loudspeaker to the infant’s left.Turns to the loud-

speaker in response to the target change lead to the illumination and activation of ani-

mated toys (lower panel).

Fig.23.1