Why can't I accurately see the reference points when reversing into the garage in Subject 2?

[OLouis]

Subject 2 The reason for inaccurate reference point observation may be related to seating posture. Precautions before driving are as follows: 1. Seating posture: First, position your hips as far back as possible until they touch the junction between the seat cushion and backrest, ensuring a stable sitting position to avoid wobbling. 2. Feet placement: Press the clutch pedal fully with your left foot and the brake pedal with your right foot. Your legs should not be fully extended; keep knees slightly bent to maintain proper force application. Adjust the seat's fore-aft position accordingly. Sitting too far back may prevent full clutch/brake pedal engagement, while sitting too close may cause knees to hit the dashboard. 3. Hand placement: Rest hands naturally on the steering wheel with wrists aligned above the wheel's top center. Maintain an upright back posture, then adjust the seatback to support your lumbar region - typically at approximately 90 degrees. 4. Head clearance: Adjust seat height to maintain at least one fist's distance between your head and the roof. Short drivers may use seat cushions for additional height if needed.