NATIVE AND ACQUIRED TRAITS 89
The Source of Native Traits 90
Reactions Appearing at
Birth Must Be Native 91
Reactions That Cannot Be
Learned Must Be Native 92
Experimental Detection
of Native Reactions 93
Is Walking Native or Acquired? 95
Universality as a Criterion
of Native Reactions 97
Some Native Traits Are
Far from Being Universal 98
Why Acquired Traits Differ from
One Individual to Another 99
What Mental Traits Are Native? 100
Exercises 103
References 104