Final answer:
The situation described involves missed opportunities due to reliance on another's promised efforts, most closely related to 'collaboration failure,' which, while not an established term in psychology.
Step-by-step explanation:
The scenario described involves a person relying on the promised efforts of another and consequently missing the opportunity to act on their own to improve the situation.
This relates to the concept of diffusion of responsibility, where individuals in a group are less likely to take action because they assume someone else will. In contrast, the bystander effect refers to the phenomenon where the presence of others inhibits an individual from intervening in an emergency.
Social loafing is where individuals exert less effort in a group because their individual contribution cannot be evaluated. None of these terms fully describe a situation where one party relies on another's promise for help, leading to a missed opportunity,
but the concept most closely related to the loss of opportunity due to reliance on others could be considered a form of collaboration failure, which is not an established psychological term but fits the context.