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Within the scope of LRS Bianchi type-I cosmological model the role of spinor field on the evolution of the Universe is investigated. In doing so, we have considered a polynomial type of nonlinearity. It is found that depending on the sign of self-coupling constant the model allows either accelerated mode of expansion or oscillatory mode of evolution. While the non-diagonal components of the energy-momentum tensor of the spinor field in case of a full Bianchi type-I model leading to thedoi:10.1139/cjp-2015-0574 fatcat:icjp4hw575gvlma5bjnhxi3zoq