Decision making does not benefit from using a foreign language: Evidence from cognitive reflection effects on intertemporal choice.
Intertemporal choice requires to decide between smaller sooner and larger later payoffs, and is captured by discount rates. Across two preregistered experiments we found no evidence that using a foreign language benefitted intertemporal choices. On the contrary, there was some evidence of stronger discounting when a foreign language was used. Our results confirm that more reflective individuals tend to discount less strongly, and their intertemporal choices are also more consistent across different reference points and perspectives. In turn, this allows for greater consistency in long-term planning, benefitting a decision maker. Thinking in a foreign language did not affect such consistency, and may actually have negative effects for reflective people. Finally, although our findings hint that the benefits of cognitive reflection may be reduced when using a foreign language. This raises the questions as to why and how using a foreign language helps only some individuals, and in some decisions.