In an RCT in which adults were given aspartame-sweetened, sucrose-sweetened or unsweetenedbeverages and supplements over 20 days, there were no significant effects on cognitive orneuropsychological measures (verbal learning, attention span, memory, motor response,cognitive efficiency, long-term memory) (184). In a second RCT, those receiving stevia for 6 weeksdid not display any changes in cognitive function, whereas those receiving sucralose showed asignificant decrease in overall memory, encoding memory and executive functions (54).