菱形紋飾為泰雅族在藝術表現上最常見之式樣，而泰雅族菱形紋飾之崇拜，主要與其普遍的『祖靈』信仰有密切關係。根據相關研究顯示，菱形紋飾在泰雅族裡象徵『眼睛』，而泰雅族將帶有『祖靈眼睛』意涵的菱形紋飾應用在服裝上，主要有兩項功能：一爲祖靈的監視，形成自身與社會一基本道德規範；二爲祖靈的保護，即平復環境上帶來的不安全感。本研究除了從泰雅族歷史神話、祖靈信仰等角度切入探討外，更輔以藝術心理學、原始藝術學及造形原理，分別探究菱形造型予人心理上之創造歷程與感受。最後，將採集之55件泰雅族菱形紋飾樣本，利用平面構成原理、美的形式原則等作爲樣本分析依據，進一步歸納泰雅族菱形紋飾之母體精神特徵與樣貌。

Rhombus pattern is the most common style on artistic expression in Atayal, and Atayal's adoration towards rhombus pattern mainly has close relationship with its' common ”Utux” belief. According to relevant studies, rhombus pattern symbolizes ”eye” in Atayal, and Atayal applies rhombus pattern, which has the meaning of ”eye of Utux”, onto clothing, it mainly has two functions, the first function is the monitoring of Utux, which forms a basic moral standards of person and society; the second function is the protection of Utux, which calms down the sense of insecurity that is brought by the environment. Besides discussing from the perspectives of historical mythologies and Utux belief in Atayal, this study also investigates the psychologically creative progress and experience that rhombus gives people through artistic psychology, primitive art and principle of formation respectively. Last but not least, 55Atayal rhombus pattern samples are collected, graphic composition principle and principle of aesthetics type are used as the analytical basis of samples, so as to further generalize the parent spiritual characteristics and appearances of Atayal rhombus pattern.