Abstract
This study investigates how HMP influences partisans' advocacy behaviors and examines how type of involvement affects HMP and advocacy groups' advocacy behaviors. Results suggest that HMP induces advocacy groups to prefer more aggressive advocacy strategies, such as attacking counterparts, and that outcome-relevant involvement is positively related to preference for both attacking and negotiation strategies. The results provide weak evidence that value-relevant involvement is negatively related to negotiation. There was no differential effect of each involvement type on HMP.
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