Pessimism

Negative generalized outcome expectancies; an individual difference reflecting the extent to which people hold generalized unfavourable expectancies for their future.

*Note that this definition considers optimism and pessimism to be unidimensional, although there is evidence to suggest that they are partially independent constructs.

Reference:

Scheier, M. F., & Carver, C. S. (1985). Optimism, coping, and health: assessment and implications of generalized outcome expectancies. Health Psychology, 4(3), 219-247. https://psycnet.apa.org/doi/10.1037/0278-6133.4.3.219

Alarcon, G. M., Bowling, N. A., & Khazon, S. (2013). Great expectations: A meta-analytic examination of optimism and hope. Personality and Individual Differences, 54(7), 821-827. https://doi.org/10.1016/j.paid.2012.12.004

Carver, C. S., Scheier, M. F., & Segerstrom, S. C. (2010). Optimism. Clinical Psychology Review, 30(7), 879-889. https://doi.org/10.1016/j.cpr.2010.01.006