Obsessive-Compulsive Disorder is an anxiety disorder that affects the "worry thoughts" that a person has. One way to think about OCD is to think about superstitions. When you do something a certain way or avoid a situation, such as walking under a ladder, you're doing so to avoid bad luck. People with OCD make up their own rituals and stick to them very strongly. Read more about Obsessive-Compulsive Disorder, what causes it, and how it can be treated.

PBS features this program on orchids, including a short video on how an orchid encourages a bee to carry pollen to another flower. There are 3 articles focusing on the flower's ability to coax insects into pollinating other orchids, new technologies that are helping orchids thrive, and even a short article about an author who wrote a fictional book about orchids. Interesting for 4th grade and above.

Psychology is designed to meet scope and sequence requirements for the single-semester introduction to psychology course. The book offers a comprehensive treatment of core concepts, grounded in both classic studies and current and emerging research. The text also includes coverage of the DSM-5 in examinations of psychological disorders. Psychology incorporates discussions that reflect the diversity within the discipline, as well as the diversity of cultures and communities across the globe.Senior Contributing AuthorsRose M. Spielman, Formerly of Quinnipiac UniversityContributing AuthorsKathryn Dumper, Bainbridge State CollegeWilliam Jenkins, Mercer UniversityArlene Lacombe, Saint Joseph's UniversityMarilyn Lovett, Livingstone CollegeMarion Perlmutter, University of Michigan

By the end of this section, you will be able to:

Describe the main features and prevalence of obsessive-compulsive disorder, body dysmorphic disorder, and hoarding disorder
Understand some of the factors in the development of obsessive-compulsive disorder