…what attracts human attention is change. …if the temperature around you changes, if the phone rings — that gets your attention. The way in which a story begins is a starting event that creates a moment of change.
Cognitive load is an amount of mental effort required to use a product. Cognitive load has a direct effect on how easily for users to interact with your app. Generally, th…
b) Every new feature that is being considered should move the needle on the key metrics (engagement or transactional) in A/B tests otherwise the feature may be of questionable value