While language is typically lateralized to the left hemisphere, right-hemisphere activation has been observed in aphasic patients during expressive language tasks. Bilateral activation could be a response to task difficulty. This study aims to see how laterality is affected by difficulty in generating word completions in healthy adults. The classic effect is that participants are slower to generate a word presented in the left visual field (LVF/RH) compared to the right visual field (RVF/LH). We predicted that as task difficulty increased, participants would demonstrate reduced LH advantage. Three-letter word-stems were classified into three conditions; easy, difficult and high frequency, based on normative data. Easy stems had numerous common word completions. Difficult stems had few and uncommon word completions. High-frequency stems had few completions with at least two common words. Stems were presented to the LVF/RH or RVF/LH. Participants were asked to generate a word. Reaction time and accuracy were recorded.