This paper reviews the relationships between trance or altered state effects, suggestibility, and expectancy as these concepts are defined in the theorizing of Weitzenhoffer (2002), Holroyd (2003), Kirsch (1991), and others, for the purpose of demonstrating how these concepts can be assessed with the PCI-HAP (Phenomenology of Consciousness Inventory: Hypnotic Assessment Procedure; Pekala, 1995a, b). In addition, how the aforementioned variables may relate to the nature of hypnosis/hypnotism as a function of self-reported hypnotic depth are discussed, along with how the PCI-HAP may be used as a means to measure hypnotic responsivity from a more phenomenological state perspective, in contrast to more traditional behavioral trait assessment instruments like the Harvard, the Stanford C, or the HIP. A follow-up paper (Pekala, Kumar, Maurer, Elliott-Carter, Moon, & Mullen, 2010) will present research data on the PCI-HAP model and how this model can be useful for better understanding hypnotism.

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Inertial measurement unit (IMU) comprising of the accelerometer and gyroscope is prone to various deterministic errors like bias, scale factor, and nonorthogonality, which need to be calibrated carefully. In this paper, a survey has been carried out over different calibration techniques that try to estimate these error parameters. These calibration schemes are discussed under two broad categories, that is, calibration with high-end equipment and without any equipment. Traditional calibration techniques use high-precision equipment to generate references for calibrating inertial sensors and are generally laboratory-based setup. Inertial sensor calibration without the use of any costly equipment is further studied under two subcategories: ones based on multiposition method and others with Kalman filtering framework. Later, a brief review of vision-based inertial sensor calibration schemes is also provided in this work followed by a discussion which indicates different shortcomings and future scopes in the area of inertial sensor calibration.

The results of two studies suggest that the Phenomenology of Consciousness Inventory has adequate reliability and validity in assessing alterations i n phenomenological experience associated with stimulus conditions, such as eyes open and closed, sitting quietly, and an hypnotic induction.

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