Everyone is a mixture of fixed and growth mindsets. You could have a predominant growth mindset in an area, but there can still be things that trigger you into a fixed mindset trait.

I grew up in an environment that promoted a very fixed mindset. It was an era that worshipped IQ and thought that your IQ was the most important thing in determining your future. My sixth-grade teacher even seated us around the room in IQ order.

The mindset ideas were developed as a counter to the self-esteem movement of blanketing everyone with praise, whether deserved or not.

Carol S. Dweck Quotes