It is better to know what you don’t know

Visual recognition: as soon as you know it is there, you know what it is.

What is the sequence of processing steps involved in visual object recognition? We varied the exposure duration of natural images and measured subjects' performance on three different tasks, each designed to tap a different candidate component process of object recognition. For each exposure duration, accuracy was lower and reaction time longer on a within-category identification task (e.g., di...

Do you know what you don't know?

Object detection and basic-level categorization: sometimes you know it is there before you know what it is.

A tight temporal coupling between object detection (is an object there?) and object categorization (what kind of object is it?) has recently been reported (Grill-Spector & Kanwisher, 2005), suggesting that image segmentation into different objects and categorization of those objects at the basic level may be the very same mechanism. In the present work, we decoupled the time course of detection...

Understanding Personal Practical Knowledge; From what teachers must know to what teachers already know

The purpose of this study is understanding the Personal Practical Knowledge (PPK) of teachers which has been done through qualitative method. Understanding PPK helps us to understand why teachers act in a specific way. In this regards, reflecting on their personal and professional narratives also help to improve their practice. This study was conducted along with 13 teachers in a non-profit pri...

Stick To What You Know

Iwill be arguing that a subject’s belief thatp is justified if andonly if heknows that p: justification is knowledge. I will start by describing two broad classes of allegedly justified beliefs that do not constitute knowledge and which, hence, cannot be what they are often taken to be if my view is correct. It is far from clear what my view is until I say a lot more about the relevant concept ...