The premise is that these two contradictory scenarios are both plausible, so which one is right?:
- Thinking in another language takes up cognitive power, so there aren't enough little grey cells left for decision-making, and you go with your gut.
- Thinking in another language forces you to think quite consciously and deliberately, so you don't have as much freedom to make impulsive choices.
This means that people fluctuate wildly depending on how the problem is worded (framed), and allow their emotions to make illogical decisions when faced with a really hard choice. If you could remove that element of 'gut instinct', people would make the same choice each time (whichever choice it was). So if 2 above is right, this fluctuation should disappear or be much reduced. If 1 is right, it should remain.