Self-serving bias: In psychology, the term "self-serving bias" is defined as a person's propensity or proclivity to "attribute" any of the positive situations or events to his or her self or character and therefore "attribute" any of the negative situations or events to some external factors.
In social psychology, self-serving bias is generally referred to as one of the types of cognitive bias.
In the question above, Lori is using "self-serving bias".