As Sal and His Wife Converse with the Neighbor One

As Sal and his wife converse with the neighbor one day, Sal is three times more responsive to the neighbor's comments than his wife is. The neighbor, however, looks at Sal's wife about as often as he looks at Sal. During the next day's conversation, Sal's wife is three times more responsive to the neighbor's comments than Sal is. This time the neighbor looks at Sal's wife five times as often as he looks at Sal. This appears to be an example of the deviation from matching known as ________, which also suggests that the neighbor finds Sal's wife attractive or interesting.