Explore the defensive cascade, commonly known as the fight-or-flight response, with insights from Peter Walker, Clinical Psychologist at Aperture Psychology in Sydney. Learn about the physiological stages—focus, freeze, flight, fight, and flop—and how they function to promote survival in the face of threats.

Explore the causes and impacts of perfectionism with Peter Walker, Clinical Psychologist at Aperture Psychology in Sydney. Learn how high and unrelenting standards can lead to chronic dissatisfaction, worthlessness, depression, and anxiety, and discover strategies to manage these tendencies.

Discover effective behavioural and cognitive approaches to combat insomnia. Peter Walker, Clinical Psychologist at Aperture Psychology in Sydney, discusses sleep hygiene practices and cognitive models to improve sleep quality. Our experienced clinical psychologists offer personalised treatment plans in Sydney and telehealth services Australia-wide.