Complex sentence: Cheskin spent most of his life investigating how design elements impacted people's perceptions of value, appeal, and relevance, and discovered that most people could not resist transferring their feelings towards the packaging to the product itself.
Split into simpler sentences: Cheskin spent most of his life investigating how design elements impacted people's perceptions of value, appeal, and relevance. He also discovered that most people could not resist transferring their feelings towards the packaging to the product itself.