In the research performed by Tronick & Weinberg, mothers were ...

[stephzh]

In the research performed by Tronick & Weinberg, mothers were instructed to interact normally with their infants' facial expressions, and then on cue to show no emotional reaction at all. This procedure is called the
 
  facial mimicking technique.
  emotional expression technique.
  still-face technique.
  social response technique.

Question 2

The most critical element in determining synchrony is
 
  attention span.
  sensitivity to mood.
  sensitivity to timing.
  love.

[zacnyjessica]

Answer to Question 1

still-face technique.

Answer to Question 2

sensitivity to timing.

[stephzh]

Gracias!

[xiazhe]

Thanks for the timely response, appreciate it