English Theme 45 pp.86-91

1
English Theme 45 pp.86-91

• Date June 12, 2007
• Room 8-405
• Instructor Mafuyu Kitahara
• Material Thelen, E. (1995) Time-scale dynamics
  and the development of an embodied cognition in
  R. Port and T. van Gelder (eds.) Mind as motion,
  Cambridge MIT Press

2
Hannah silent lady

• No recording of limit-cycle, just hands
• Two infants need different strategies
• Gabriel too energetic, needs more control
• Hannah too silent, needs more energy

3
First reach (1)

• Gabriel Hannah

4
First reach (2)

• Gabriel gtgt Hannah
• Area of trajectories (seen from front)
• Speed (direction-less)
• Torque (MDT inertia, vs MUS muscle)
• Gabriel
• attempted to slow down, but still spring-like
• Hannah
• smooth, slow, mature-looking

5
Gabriel more detail

• reach (M--gtT) continued from other moves.

6
Time-scale dynamics

• Slow process body and muscle grow
• Fast process everyday movements
• Everyday process feed learning
• deus ex machine is not there!