The NLRB's decision in Wright Line lays out a 3 part test to determine whether an employee was disciplined or discharged for legitimate reasons, rather than as retaliation or coercion for union activities.

Wright Line

A legal test used in labor law to determine if an employer's action against an employee was motivated by anti-union sentiment.

Retaliation

Adverse action taken by an employer against an employee as punishment for engaging in legally protected activity, such as complaining about discrimination or harassment.

Union Activities

Various actions undertaken by labor unions including organizing, bargaining, striking, and other efforts to protect and advance members' interests.