本論文主旨為研究台灣企業併購下心理契約違反與工作投入度之間的關聯，並以組織公平為調節變數。首先研究併購下員工之心理契約違反與工作投入度間的關聯，再針對組織公平作為調節變相進行分析。本論文採用量化研究，作者以紙本問卷與網路問卷收集資訊。作者最終採計277份有效問卷，採計對象為經歷過被併購且繼續留任之員工。以驗證是因素分析（ＣＦＡ）檢查模型配適度並以階層回歸分析驗證假設。結果顯示併購過程下員工心理契約違反與工作投入度呈負相關，而感知組織公平對其關係有顯著調節作用。由此研究發現公司在經歷併購時員工視感知組織公平視為比心理契約違反更為重要的因素。

The purpose of the study aims to investigate the relationships among psychological contract breach (independent variable), job involvement (dependent variable) and perceived organizational justice (moderating variable) in mergers and acquisitions (M&A) enterprises in Taiwan. To be more specific, this study has two main objectives. First, the author explored the relationship between psychological contract breach and job involvement. Second, the author tested the moderating effect of perceived organizational justice on psychological contract breach and job involvement. This study utilized the quantitative approach and the data was collected by paper-based and online questionnaires. The valid samples were 277 employees who have experienced M&A process and still continued to work in the remained companies. CFA was conducted to assess the model fit and the hypotheses were tested by hierarchical regression analysis. The results showed that psychological contract breach was significantly negative correlated to job involvement. The organizational justice had a moderating effect on the relationship between psychological contract breach and job involvement. Therefore, when companies face M&A situations, employees perceived organizational justice as an important factor, which have impact on their job involvement; even if they feel that the company violated the psychological contract with them.

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