{Reference Type}: Systematic Review {Title}: The Frequency of Design Studies Targeting People With Psychotic Symptoms and Features in Mental Health Care Innovation: Secondary Analysis of a Systematic Review. {Author}: Veldmeijer L;Terlouw G;Van Os J;Van 't Veer J;Boonstra N; {Journal}: JMIR Ment Health {Volume}: 11 {Issue}: 0 {Year}: 2024 Jan 9 {Factor}: 6.332 {DOI}: 10.2196/54202 {Abstract}: This study examined and reflected on the frequency of people with psychotic symptoms and features as the target population in design studies for mental health care innovation.