Quantitative Analysis of the Interaction of Individuals

Abstract

apical (distal) member of the pair of daughter cells is always smaller than the basal. It has denser protoplasmic contents and its walls tend to bulge outward slightly. At some distance back from the tip, when elongation has ceased, this cell produces a root hair. The other cell, which rarely may divide again, never produces a hair. In these genera, therefore, differentiation for this character occurs very early and the potencies of the cells are sharply limited almost from the beginning. In Chloris and Sporobolus, on the other hand, trichoblasts ordinarily do not appear, all the cells being essentially equal in size from the beginning and all being capable of producing root hairs. Some of the cells stain differently from others, and a differentiation of root hair cells may occasionally be observed before the hairs are formed. These plants evidently provide good material for a study of the factors controlling the differentiation of root hairs. Summary.-Materials and methods are described, by the use of which it is possible to observe and measure the multiplication and growth of cells in living root meristems. This technique has been applied to the problems of the location of new cell walls, of "sliding growth," and of the differentiation of cells which are to form root hairs.

Mutual influence in expressive behavior: Adult–adult and infant–adult dyadic interaction.

“…Only the first three are considered here because simultaneous speech seems to relate more to dominance than to involvement. Matarazzo and his colleagues, working from the traditions begun by Chappie (1939Chappie ( , 1940, developed a more subjective set of variables to describe interview dialogues. These were utterance, latency, interruption, and initiation time latency.…”

Universals and cultural variation in turn-taking in conversation

“…A fundamental part of the infrastructure for conversation is turn-taking, or the apportioning of who is to speak next and when (1). Previous research on turn-taking has examined cues used in recognizing opportunities for turn transition (1)(2)(3)(4), the time course of a turn in an exchange (5), and the timing of turn transitions (1,(6)(7)(8)(9)(10). In English conversation speakers do not wait for pauses to begin their turn but avoid gaps and overlaps.…”

Language in Psychotherapy

“…Nevertheless, only in the very recent past have investigators seemed to concern themselves with the form (and other normative characteristics) of the distributions of these two basic and highly stable interview variables" (Matarazzo, Wiens, Matarazzo, & Saslow, 1968, p. 353). Both the rationale and methodology derived initially from Chapple's Interaction Chronograph method (Chapple, 1939;Chapple & Donald 1946) and his interaction theory of personality.…”