A theory that the behavior of nations to one another is a result of their differences and similarities in attributes has been tested on 1955 data. This paper reports a retest of this theory on 1963 data. The model interprets differences and similarities as implacable forces like gravity and centrifugal force which the nation cannot alter and which affect its behavior regardless of its history, culture, or other unique characteristics. A second model interprets differences and similarities as general forces modified in their impact on behavior by the unique characteristics of each nation. A retest of this model was consistent with previous findings in showing an ability to explain around fifty percent of the variation in international behavior. (Author).

In connection with the development and testing of a field theory of international relations, the 1963 dyadic behavior of nations was analyzed to determine its dimensions. A secondary analysis was also done to determine how well these dimensions could be predicted from those found in a similar analysis of 1955 data. Large shifts are reported in the behavior of dyads between 1955 and 1963. The development of a cooperation-conflict scale for 1955 and 1963 and a plot of selected dyads on it shows that the scale measures the major 1955-1963 shifts in behavior. (Author).

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The study ascertains scale values for United Nations members on a large number of heterogenous variables (national attribute data); correlates the obtained scale values with general assembly voting pattern data (23rd and 24th Sessions); draws conclusions and generalizations from the observed relationships; and discusses the relationship of the findings to previous research and to certain theories of international behavior. The three most important predictors of General Assembly voting were found to be 'economic development, ' 'democracy' and 'U.S. relations.' Economically developed states were almost consistently 'against the majority, ' when significant correlations emerged on the issues, while 'Democracy' and 'U.S. Relations' were 'with' the majority on some issues and 'opposed' on others. The techniques of analysis included Spearman's Rho factor analysis, and cononical correlation. (Author).

The effects of policy decisions on international behavior are discussed as not adequately separated from the effects of social ecology (e.g., power, development, type of political system) in traditional behavioral research. The deeper incursions that can be made into policy analysis by behavioral science methods, as distinguished from game theory, are seen to include concepts of goal, drift, and actual states of the international system in research designs, and to analyze gaps between predicted and actual behavior patterns. (Author).