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H2a. Compared to Dynamic Display, DID increases users graph comprehension for automatic conceptual message lookup process H2b Compared to Dynamic Display, DID increases users graph comprehension for inferential and top-down encoding process

Next from the perspective of affective dimension, users form positive, neutral or negative attitude towards the perceived usefulness of the visualization tool in decision making. The study predicts that DID with interactivity and dynamic display of the multi dimensional data affects decision maker’s attitude regarding perceived usefulness of the tool more significantly in favor of the tool than dynamic graph.

H3 Users attitude towards the perceived usefulness of the DID display differ from their attitude towards the perceived usefulness of the dynamic display.

Theory of Cognitive Fit and Time constraints

The theory of Cognitive Fit suggest that a match between External representation and users’ tasks is important for the realization of positive results from the display format [52]. While DID generally influences decision making, the degree to which DID affects decision making varies contingent upon the task types being examined. Decision makers may be faced with different types of tasks. Tasks for Problem solving can be retrieval, Communication of facts, Comparison of alternatives, Trend analysis, Recognition and recall, Problem finding, Problem comprehension and Problem solving[36]. When time in money decision makers have to make decisions fast and thus decision task can be time critical. In prior studies terms ‘‘time pressure’’ and ‘‘time constraint’’ are most commonly used interchangeably [53]. 

Prior research so far has not investigated the time-constraint tasks that are best supported by DID. For this study High Time Constraint (HTC) tasks are those that force the decision makers to perform under high time pressure. It is different from Low time-constraint (LTC) task for which the decision makers are not under any time pressure to perform.

These types of task types moderate the degree to which DDI affects decision making. Research suggests for HTC task , decision makers accelerated their processing, are more selective in processing and instead of evaluating one alternative at a time (depth based) the decision makers concentrate on attribute based ( breadth wide) pattern of processing[54]. Dynamic Interactive display (DID) have features that lets the users manipulate the data and retrieve details on demand but DID are complex because it provides access to several layers of data which the users can slice and dice. 

Therefore when DID is used with HTC task , decision makers are unable to accelerate processing as the complexity of the graph makes the users experience information overload , which affects their performance negatively. However when DID is applied to LTC task, then the interactivity is useful because access to several layers of information and availability of time lets the decision makers process information in depth. Thus DID for HTC task does not contribute as much to decision making accuracy, problem comprehension and perceived usefulness as it does for LTC task.

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