To measure the impact of positive reinforcement on your sales team's performance, you need to set clear and measurable goals and track the relevant metrics and indicators. For instance, you can assess sales revenue and growth by tracking sales volume, value, frequency, average deal size, conversion rate, and retention rate. Additionally, you can measure sales productivity and efficiency by tracking the number of calls, emails, meetings, proposals, demos, and follow-ups. Moreover, you can gauge sales quality and satisfaction by examining customer feedback, ratings, reviews, referrals, and testimonials. Finally, you can assess sales engagement and morale by looking at employee feedback surveys, interviews, assessments as well as employee turnover, absenteeism, and burnout. By measuring the impact of positive reinforcement on your sales team's performance in this way, you can evaluate its effectiveness and make adjustments as needed. You can also use the data and insights to further reinforce your team's performance and celebrate their achievements.