I regularly notice the upside of being a bit grumpy.
It helps me get things done. It helps me overcome inertia so I can do tasks I, on other days, may put off due to some resistance.
This is an example of helpful daily-life strategies. I notice I am a bit grumpy, and I intentionally use that grumpiness and the energy behind it to get things done I have earlier put off.
In the longer run, it’s also good to explore what’s behind the resistance and resolve it. It may be (unexplored) fear and discomfort, and behind that stressful beliefs and identifications, and behind that early life experiences creating wounds, stressful beliefs, and perhaps (mostly low grade) trauma.
Going back to the initial strategy, there is now some research on grumpiness and pushing through resistance. It’s an example of research where – I assume – the researcher had a hunch, followed up on it through research, and had it confirmed. The hunch may have been from noticing something in their own life, or being told about it, or reading about it in fiction literature. And, of course, the research may later be interpreted in different ways, or later research may find something else. That’s always a possibility.
It’s also an example of research that may seem a bit obvious. Since psychology as a scientific discipline is still in its infancy, a lot of the research will seem a bit obvious. It needs to be to create a foundation to build on. And, sometimes, they do find things that initially may seem counterintuitive.